DIRTcar Stock Car

Primary Series Contacts

Name Position Phone Number E-Mail Address
Sam Driggers Director, Series & Sanctioning (704) 467-7786 sdriggers@dirtcar.com
Jim Magill Points Coordinator (618) 302-0032 jmagill@dirtcar.com
Jordan DeLucia PR Coordinator (315) 440-2662 jdelucia@dirtcar.com

World Racing Group Contacts

Name Position Phone Number E-Mail Address
Corrie Goss Sr. Manager, Client Services (724) 464-3649 cgoss@dirtcar.com
Tracey McDaniel Director, Human Resources/Memberships (704) 795-7223 tmcdaniel@dirtcar.com
Jim Chiappelli General Manager, DIRTVision (704) 707-0275 jchiappelli@dirtcar.com

Weekly DIRTcar Racing Points Breakdown (All Divisions)

Place Points Place Points
1st 75 14th 37
2nd 70 15th 36
3rd 65 16th 35
4th 60 17th 34
5th 55 18th 33
6th 50 19th 32
7th 48 20th 31
8th 46 21st 30
9th 44 22nd 29
10th 42 23rd 28
11th 40 24th 27
12th 39 25th 26
13th 38 26th 25

(Points drop by one (1) point for positions twenty-six (26) to forty (40) if more than twenty-five (25) starters are approved)

A. Drivers not in an A-Main Feature, where a B-Feature is run, will receive finish points starting with the first non-transfer.  Points will drop one (1) point per position to a minimum of ten (10) points.  Any driver participating in the event will receive a minimum of ten (10) finish points.
B. Drivers not in an A-Main Feature will receive 10 finish points.
C. The 2022 point season will begin on January 1, 2022.
D. Only a driver’s highest finish points race will be counted each week for events from January 1, 2022, to March 31, 2022.
E. All races will count towards accumulated points starting April 1, 2022 going through September 25, 2022.
F. The 2022 point season will conclude following all events originally scheduled on or before October 1, 2022.  The exception is an A-Feature that is postponed due to weather, which must be completed within fourteen (14) days from the original race date, but may not be held during or after the National Championship event(s).
G. Western region(s) or state points may continue past October 1, 2022, but only for regional/state points and events must be completed by November 12, 2022, and points will include championship events.
H. For any event to award points, a sanction agreement must be in place.  Added events must be approved ten (10) days prior to the event.
I. Drivers may not participate in multiple top divisions (i.e. Late Models and Pro Late Models) without approval.

Bonus Points

A. Bonus points of one (1) point for every car over twenty-five (25) entered in the event will be awarded at each race.  The maximum bonus points awarded is five (5) points per race.

Event Points

A. Event points are described as the combined total of finish points and bonus points for a given race.
B. All races must have ten (10) or more cars entered in order to receive full points.  If a race has nine (9) or fewer cars, their points will be reduced by ten percent (10%) for each car missing.
C.¬†Tracks may be allowed to run more than one (1) feature event per night for any division.¬† Each feature must pay at least the same purse as a weekly show and each feature will be required to pay an additional sanction fee.¬† ‚ÄúDouble‚ÄĚ features must be approved in advance.

Replacement Races

A. A driver may begin replacing event points after the driver has completed the minimum number of races.
B. Replacement races start with a driver’s lowest event points race.
C. A driver will never lose points with a replacement
D. Minimum number of races before event points may be replaced:

TO ALL COMPETITORS AND PARTICIPANTS

A. These rules are recommended for the 2024 DIRTcar Stock Car Division. All participants must follow track rules.
B. The 2024 DIRTcar Stock Car rules have been established to include the rules in several different regions of North America.
C. The following are the 2024 DIRTcar Stock Car rules. All amendments supersede any previous rules regarding any technical article and/or aspect.
D. Under the guideline of the 2024 DIRTcar Stock Car rules and as stated in the 2024 DIRTcar rulebook, all DIRTcar rules apply to all sanctioned divisions.
E. The specifications published shall be considered a section of the ‚ÄúGeneral Rules and Specifications‚ÄĚ for all events, series and sanctions by World Racing Group. All sections should be considered when determining specifications and governance.

Rule Changes Effective in 2025

A. Cockpits will be allowed.  An inspection hole is mandatory.
B. 604 Crate will be on a 2-barrel carburetor.
C. Spoilers will be allowed. (Details to come)
D. Plastic fenders will be allowed.

Section 1 – Engines

A. Open Engine Option

a. The engine and frame must be manufactured by the same company when introduced into competition.
b. The number one (1) spark plug must align itself in a perpendicular line with the center of the upper ball joint for each manufacturer and be set back no further towards the rear of the car.
c. The engine block must be cast iron from an OEM manufacturer. The SHP DART Block will be permitted for competition.
d. DART Big M and Little M Blocks permitted.
e. Aluminum engine blocks are not permitted.
f. Only cast iron 23-degree cylinder heads are permitted.
g. Aluminum cylinder heads of any origin are not permitted.
h. Roller tip rocker and roller type rocker arms are permitted.
i. Roller cams of any-type are not permitted
j. Roller and/or mushroom-type lifters are not permitted.
k. Cast Iron or Aluminum intake manifolds are permitted.
l. Cast Iron or aftermarket exhaust headers are permitted. The direction of the exhaust flow must exit away from the car and the track surface.
m. No Crossover Headers.
n. No Tri-Y Headers.
o. Conventional or Aluminum radiators are permitted.
p. Only mechanical fuel pumps permitted.

B. Open Engine Electronics and Ignition System

a. HEI distributors are permitted. The OEM firing order for the engine must be maintained and unchanged (GM 1-8-4-3-6-5-7-2) (Ford 1-5-4-2-6-3-7-8)
b. Racing-type distributors not permitted.
c. MSD boxes and/or any other ignition amplifier boxes of any type not permitted.
d. All cars must be equipped with an operable starter in working condition.
e. Any, one (1) 12 or 16-volt battery is permitted.
f. Any battery that is mounted inside the driver’s compartment must be completely enclosed in a marine-type box with a lid and mounted securely.

C. Carburetor

a.¬†One 500 CFM 4412 Holley unaltered carburetor is required. The local track rules reserve the right for carburetors to be claimed and/or changed (i.e., ‚Äúswapped‚ÄĚ) for competitive analysis and/or inspection.
b. Any Holley 2 bbl. carburetor, part number 0-4412 will be permitted provided it is unaltered from the manufacturer.
c. The original choke tower must remain in its stock position and configuration if applicable
d. The choke blade may be removed.
e. External metering blocks will be permitted.
f. Any other alterations to the body of the carburetor, internal working mechanisms, venturis, throttle plate and/or any other part and/or component of the carburetor will not be permitted
g. Carburetor jets may be replaced and/or adjusted as an engine tuning method.
h. All carburetors must pass the go-no-go gauge on top and bottom and are subject to inspection at any time.
i. NO Super Bowl type setups allowed.
j. Maximum one-inch spacer plate is permitted under the carburetor. Spacer thickness must remain 1 inch thick across the entire plane of the spacer.

D.¬†Chevrolet Performance Parts 602/604 Crate Engine ‚Äď New Option

a. The Chevrolet Performance Parts 602/604 engine (GM Part Numbers 88958604 or 19418604, 19258602, 88958602) will be allowed as an optional engine for competition during the 2024 racing season.. (The Chevrolet Performance Parts 602/604 crate engines may have part number changes from time to time as issued by the manufacturer.)
b. All engines and all components must remain in their original configuration and form as purchased and/delivered from GM Performance.Any changes and/or modifications to the engines or related parts will result in disqualification from the event..
c. Any engine and/or related part that is sealed from the manufacturer that has been tampered with and/or removed will result in an immediate penalty. The minimum penalty will be a 1,000.00, One thousand dollar fine,loss of all accumulated for the year and a loss of all earned purse money for the event night that the infraction was discovered..
d. Penalties issued may include and will not be limited to a suspension of the car,driver,car owner,engine builder from participation in any World Racing Group event..
e. Any participant (driver,car owner,and/or engine builder) that is found to have tampered with the engine will lose all points accumulated for the season,all earnings and the parts will be impounded for competitive analysis. In addition.the participant may be suspended indefinitely from all world Racing Group/DIRTcar events.
f. Accepted seals for the 2023 season will be DIRTcar,RYR, and CRUSA.

E. Crate Engine Electronics and Ignition System

a. Magnetos will not be permitted.
b. Electronic ignition will be permitted.
c. MSD-type, ignition amplifier boxes will be permitted. The MSD#6430 6ALN ignition amplifier box or the MSD#8727CT Digital Soft Touch HEI Rev Control Limiter are the only ignition boxes allowed. Only one ignition box allowed.
d. Series retains the right to change MSD boxes with any car at any time without notice.
e. All cars utilizing the crate option and using the MSD #6430 must run one maximum 6200 RPM chip.Crate engines running the MSD #8727 Soft Touch must set the rev. limiter to a maximum 6200.
f. Any device that changes or has the ability to change the ignition advance is not permitted.
g. All electronic and/or computerized wheel spin and/or ignition retardation and/or accelerating limiting and/or traction control devices of any type will not be permitted.
h. Adjustable ping control devices, dial a chip controls,timing controls, and/or automated controls will not be permitted.
i. Adjustable restrictor plates will not be permitted.
j. Remote control components of any type will not be permitted.
k. Radios and/or devices for transmitting voice and/or data will not be permitted.
l. Data acquisition systems will not be permitted.
m. DIRTcar reserves the right for ignition boxes to be claimed and/or changed (i.e.,’swapped’) for competitive analysis and/or inspection.

F. Crate Engine Carburetor

a.¬†One maximum 750 CFM unaltered carburetor will be permitted. The carburetor must have a maximum 1- 11/16‚ÄĚ inch base plate. Carburetors must pass go-no go gauge. DIRTcar reserves the right for carburetors to be claimed and/or changed (i.e., ‚Äúswapped‚ÄĚ) for competitive analysis and/or inspection.
b. A maximum one (1) inch spacer measured between the bottom of the base plate and the top of the intake manifold, including gaskets, will be permitted. The spacer must remain one (1) inch across the entire plane of the spacer.
c. The spacer must not extend into the intake manifold.
d. One gasket will be permitted from the carburetor to the spacer. One gasket will be permitted from the bottom of the spacer to the top of the intake manifold.
e. Gaskets must be standard for application. Gaskets that exceed a standard OEM thickness for a carburetor/spacer type application will not be permitted.
f. The use of two (2) throttle return springs is recommended.
g. An approved carburetor roll-over plate that prevents fuel spillage in case of a roll over is highly recommended.

i. Carburetors with plate(s) will be mandated at a future date to be announced.
ii. Currently approved roll over plate approved as follows:

1. Willy’s Carb & Dyno shop LLC Part # WCD4000SB
2. Willy’s Carb & Dyno shop LLC Part # WCD4002

h. No Super Bowls

G. Chevrolet Performance Parts 602/604 Crate Engine Used Option

a. For the 2024 season there will be an option to run a used engine option that meets the following criteria.

i. An engine has been repaired or rebuilt utilizing the correct Chevrolet Performance parts according to the Chevrolet Performance parts manual and carries the DIRTcar approved wire cable seals.

H. Chevrolet Performance Parts 602/604 Used Crate Engine Mandatory Verification Policy/ Process

a. If an engine has all the factory installed bottlecap or breakaway seal bolts intact, with no damage or markings it must be submitted to a DIRTcar approved Verification Center. The engine will be presented along with the correct fee for the process.

i. Bottle Cap seal engine is $525.00 (Five hundred and twenty five dollars)
ii. Breakaway bolt seal engine is $650.00 (Six hundred and fifty dollars) (Requires a full set of seals)
iii. If the engine passes the Verification process and dyno runs. It will then have the Official DIRTcar wire cable seals installed and returned to the owner. If it does not pass it will be returned to the owner and funds will be forfeited to the engine shop operator.

I. Chevrolet Performance Parts 602/604 New Crate Engine Mandatory Verification Policy/Process

a. Must pass the cam profile and static compression test.
b. New engine verification fee will be 350.00 (Three hundred and fifty dollars).
c. All engines will need to be verified for the 2023 racing season.

J. Chevrolet Performance Parts 602/604 Crate Engine ‚Äď Authorized Engine Verification Centers:

NCP Speed and Machine
110 N. Webster
Taylorville, IL 62568
217-825-8249
Heath Clayton
HP Machine
18 Front St.
Williamsport, IN 47993
765-762-6315
Jeff Houchens
Baldwin Racing Engines
5673 State Hwy KK
Friedheim, MO 63747
573-788-2329
Jeff Baldwin
Race 1
299. E. Western Ave.
Poland, OH 44514
330-540-7223
Brad Hibbard
Ingram Engines
445 Troy Hill Rd.
Kittanning, PA 16201
724-954-4340
Mike Ingram
Eagle Racing Engines
4917 Ball Rd.
Knoxville, TN 37931
865-408-1000
Cory Hedgecock
Travis Kern Racing Engines
49 Newton St.
Bedford, IN 47421
812-583-2489
Travis Kern
C&M Engineering
1220 Larry Power Rd.
Bourbonnais, IL
815-932-3388
Scott Chamness

Section 2 – Transmission, Driveline, and Driveline Components

A. All Types:

a. The transmission must have a minimum of at least two forward gears and one reverse, plus neutral position.
b. With the motor running and the car in still position, the transmission must be able to engage the car in gear and the car must be able to move forward, then backward.
c.¬†Only OEM production type transmissions will be permitted ‚Äď two speed, three speed, four speed and automatic.
d.¬†Five speed (or more) transmissions, ‚Äúin and out‚ÄĚ boxes, and/or quick change will not be permitted.
e. All functioning shift levers must be located in the OEM position. The flywheel and/or flex plate must be bolted directly to the end of the crankshaft, and the pressure plate must be fastened and/or bolted directly to the flywheel/flex plate.
f. Only one (1) flywheel/flex plate will be permitted. All driveline components within the bell housing must rotate consistent with the RPM of the engine while the car is in any gear. Only unaltered an unaltered OEM flex plate and/or an OEM replacement will be permitted.
g. All bellhousings must be steel.

B. Manual:

a. Any manual gear-type transmission must be in an OEM or OEM replacement case and have a working 7.25-inch minimum diameter, steel and/or aluminum, single or multi-disc clutch inside an explosion proof STEEL bell housing. The bell housing must be a minimum 270 degrees around the top of the clutch/flywheel area.

C. Automatic:

a. Any automatic-type transmission must remain in an OEM or OEM replacement case, with a functioning OEM appearing pump.
b.¬†The original OEM bellhousing must have an approved scatter shield constructed of minimum 0.125‚ÄĚ inch by three (3) inch steel, 270 degrees around flex plate. Manual bump starts will be permitted.

D. Aftermarket Transmission

a. Approved aftermarket transmissions are Bert (Part #LMZ/GEN II), Brinn (Part #70001), Falcon (Part #60100), RaceGator (Part #140002/140002-C) and Mitchell Machine Bullet Transmission.
b. No reverse mount starters.
c. No ball spline allowed.
d. Starter must bolt to the engine block in the factory/stock location.

E. Drive Shaft

a. The driveshaft must be a minimum of two (2) inch diameter and made from magnetic steel.
b. The driveshaft must be painted white and clearly labeled with the car number on the white portion of the driveshaft.
c. Only magnetic steel slip-yokes will be permitted.
d.¬†A 360-degree drive shaft loop will be required and must be constructed of at least 0.25‚ÄĚ inch by two (2) inch magnetic steel, and/or one (1) inch diameter tubing, mounted six (6) inches behind the front universal joint. A second drive shaft hoop is recommended and must be placed within 12‚ÄĚ inches of the front universal joint.

F. Rear End

a. Torque differentiating differentials such as DPI Gold Track & Platinum Track will not be permitted.
b. Stock passenger car, pickup, and floater rear ends allowed (3/4-ton max.). No aluminum allowed except lowering blocks and axle cap. Lowering blocks cannot be adjustable. Hubs and rotors may be OEM or aftermarket steel. No cambered rear ends allowed (one piece drive flange only. Panhard bars are not allowed.
c. Quick change rear ends will be permitted. All components must be STEEL

i. Quick change must have magnetic steel tubes and steel axles.
ii. Lower spring perches must be welded to the axle tubes.
iii. No scalloped ring gears.
iv. Must use a 10 inch ring gear and minimum 1 inch wide solid spur gears.

d. Locked rear ends only. Welding of gears in the rear end will be permitted.
e. Only non-adjustable upper trailing arm brackets will be permitted and must remain level from side to side.
f.¬†Lower trailing arm brackets may be no longer than 7-1/2‚ÄĚ-inches from the bottom of the axle tubes to the bottom of the bracket and have no more than 5 holes from adjustment.
g. General

i. Traction control devices of any kind will not be permitted. This includes, but is not limited to:

1. Any system from Racetronics
2. Any system that ties into the power steering
3. Any system that ties into the brake system
4. Any system that ties into the electrical system of the engine

Section 3 – Fuel, Fuel Cells, and Fuel System

A. Only gasoline-type fuels will be permitted.
B. The fuel cell must be securely mounted in the rear of the car and secured with straps. It is recommended that the fuel cell be mounted solidly to the rear frame rails of the vehicle in a fabricated manner.
C. All fuel cells must be enclosed in a metal container.
D.¬†The fuel cell must be a steel container with a minimum of two (2) one (1) inch by 1/8‚ÄĚ (inch) steel straps on each side of the container to mount the fuel cell.
E. Only gasoline will be permitted. Methanol and/or any other type of fuel and/or any type of fuel additive will not be permitted.
F. E-85 will be permitted.
G. NO C85.

Section 4 – Electrical Systems, Batteries, and Electrical Accessories

A. The battery must be securely mounted and shielded.
B. The battery must not be mounted inside the driver’s cockpit.

Section 5 – Chassis, Frames and Roll Cage

A. Chassis

a.¬†Any American manufactured cars and/or full-size ‚Äúuni-body‚ÄĚ type cars 1964 and newer will be permitted. Sports car chassis for the Chevrolet Camaro/Pontiac Firebird and/or the Ford Mustang from 1967 to 1985 will be permitted. If utilizing a unibody frame/chassis, the stock unaltered floor pan is required, front to rear. 1980 or newer Ford unibodies may be replaced with Ford full frames. May be shortened to one-hundred seven and one-half (107.5) inches minimum.
b.¬†All vehicles must maintain a minimum of 107.5‚ÄĚ (inch) wheelbase. Maximum one-inch difference from side to side.
c. Altering of the stock frame, with the exception of repair to the original frame to maintain original specifications, will not be permitted. Repairs that will be acceptable will include patching of holes and/or rusted) areas of the frame. Repairs will be approved at the discretion of DIRTCAR Officials and/or local track officials.
d.¬†The rear frame may be replaced from the rear shock absorber mounts toward the rear of the car using minimum 2√ó3 square tubing or minimum 1-3/4‚ÄĚ round tube. Regardless of make, model or style of vehicle, replacement may only be made behind the rear shock absorber mounts.

B. Roll Cage

a.¬†A minimum 4-point competition roll cage is required. The roll cage must be constructed of magnetic steel tubing that is a minimum of 1¬Ĺ‚ÄĚ in diameter, with a minimum tubing thickness of .095 (wall thickness). The roll cage must be located within the stock OEM parameters of the doors of the vehicle. Offset cages will NOT be permitted. Driver‚Äôs head must not protrude outside of the cage with the helmet on. The Driver‚Äôs body must remain inside the cage.
b. A minimum of three (3) door bars are required on each door, parallel to the ground, and perpendicular to the driver. Minimum four (4) uprights tied from frame to top of door on driver’s side.
c. A minimum of three (3) driver protection bars are required in the windshield.
d. Front and rear bars that pass through the firewall will be permitted, with one (1) kicker bar to the frame.
e. A radiator protection bar will be permitted.
f.¬†The rear vertical roll bar hoop must be mounted on the rear body mount in the center section of the frame a maximum of 84‚ÄĚ-inches rearward of the centerline of the right front wheel/spindle. Rear vertical roll bar hoops mounted on the rear frame rails (rearward of the rear body mounts) will not be permitted. The rear vertical roll bar hoop of the roll cage should be perpendicular to the frame and must not exceed a ten (10) degree variation from perpendicular in its vertical rise from the frame.
g.¬†There must be a minimum of 40‚ÄĚ-inches between the outside edge of the front and rear down bars at the top of the door panel. A maximum of 41‚ÄĚ-inches (48‚ÄĚ-inches on 1988-1996 GM-type bodies) from the top center of the windshield to the front edge of the rear hoop and a maximum of 13‚ÄĚ-inches (20‚ÄĚ-inches) for 1988-1996 GM-type bodies) to the front edge of the top halo.
h. The top halo must be no less than thirty-six (36) inches across left to right and twenty-nine (29) inches front to back, from outside to outside
i. One (1), 1-3/4″ X .095 thickness DOM round tube may be added parallel to the right-side frame rail not more than 10 inches in from the outside of the frame rail. The right front cage down bar may be mounted to it but must be centered on the tube.
j. A minimum of one cross- bar in the top halo of the roll cage is required.
k. Passenger side front down bar may be moved in a maximum
l.¬†The rear hoop must be a maximum of 12‚ÄĚ-inches in from the bottom of the opera window and have an X Brace consisting of one full horizontal bar and one full diagonal bar.
m. Steel door plates are required. Steel door plates with eighteen (18) gauge or forty-nine thousandths (.049) inch minimum thickness metal must be securely welded to outside of door bars on the driver’s side. Plate must cover the area from the top door bar to the rocker panel and from the rear down post to six (6) inches in front of the seat. Must be visible for inspection.

Section 6 – Weight

A. The minimum weight requirement at all times will be 3,000 lbs. (pounds)
B.¬†All weights must be securely mounted with two (2) ¬Ĺ‚ÄĚ (inch) bolts securing them to the frame in a positive manner. The weight(s) must be painted white with the car number clearly marked on them. All weights must be mounted under the body of the car.
C. All added weight(s) must be securely attached to the frame inside the frame rails and behind the body. Frame is defined as the steel welded structure only.
D. Any part that moves or is not a fixed component to the steel frame structure may not be used for any weight attachment.
E. No weight of any kind is to be allowed on the rear end or axle tubes.
F. No weight of any kind is to be allowed in the driver’s compartment.
G. No weight of any kind is to be attached to the front or rear bumpers of the vehicle.
H. Weight must be mounted to the frame or roll cage.

Section 7 – Body

A. Car bodies must be installed using minimums and maximums as outlined in the Body Dimension Diagram in Amendment A and Amendment B.
B. The body, body mounting position and overall appearance must retain dimensions as published for that body style. The following body styles are allowed: Grand Prix, Monte Carlo, Camaro, Mustang, Camry, Challenger. Body must resemble the type of car being claimed. Example: If you claim it is a Camaro, then it must look like a Camaro.
C. Body panels may not be curved or bowed inward (towards the interior of the car.)
D. The body may be magnetic steel or aluminum.
E. Stock OEM or aluminum aftermarket replacement hood allowed. Hood must have factory feature lines, be separate from fenders and in OEM location.. Hole in the hood allowed for air cleaner clearance only. The back of the hood must be sealed off from the driver’s compartment.
F.¬†Raised hood boxes will not be permitted with the exception of aftermarket fiberglass hoods. The aftermarket fiberglass hood may have a maximum raised surface of 3.5‚ÄĚ-inches in height provided it is pre-manufactured into the design of the hood. Aftermarket 3.5 maximum hood scoops will be permitted.
G.¬†Front nose shall be stock OEM or Plastic Aftermarket DIRTcar approved with a maximum installed width of 73‚ÄĚ inches. Late Model, or wedge type aerodynamic noses will not be permitted. Exposed tubing, bracing, or bumpers outside of the nose piece will not be permitted. No raked mounting of nose. Floppers or flares, of any kind, that are added to the car (fenders, nose, etc.) WILL NOT be permitted. Fenders and nose piece must remain tight with the body lines on the car.
H. The rear of the car must be enclosed with a stock appearing plastic, aluminum, or approved aftermarket plastic filler panel. The rear of the car must be enclosed with stock or aftermarket/plastic, DIRTcar approved tailpiece. Holes will not be permitted in the rear cover of the car. Rear bumper cover must be no less than 20.5 inches from top to bottom and completely enclosed from left to right. DIRTcar approved aftermarket tailpieces are mandatory.
I. The rear bumpers, behind the rear cover, must have round edges, not sticking out further than the side of the car and connect solidly to the frame.
J. Bodies that appear to be wedge shaped, and/or do not have stock contours/shape in appearance will not be permitted. ABSOLUTELY NO FLAT SIDED BODIES. ZERO TOLERANCE.
K. Homemade steel/aluminum body panels are permitted, and must follow the configuration, bend, and shape of the stock body.
L. Quarter windows/Sail panels must follow published dimensions specific to the body style and must be the same dimensions on each side of the car. Quarter windows/sail panels must be flat and straight from roof to top of quarter panel and not bow in or out.The Opera window should be visible. Clear Lexan may be used to cover opera windows, if not the opera window must remain open (both sides) Late model/modified (open or closed) type sail panels will not be permitted..
M. OEM or aftermarket size trunk lid mandatory. Access/inspection holes serving the purpose as a trunk, will NOT be permitted. Trunk lids must be removable.
N. Station Wagon, Truck, SUV, body styles not permitted.
O. Car Body must be installed using minimums and maximums as outlined in the Body Dimension Diagram.
P. NO Late Model/Modified style roofs. The top and/or roof of the car must be fastened in its dimensions as published.NO FLAT ROOFS.
Q. Roofs can have no more than 1.5 inches of rake from front to back and must be level side to side.
R. Roof supports/pillars must resemble stock and be in stock location.
S.¬†The front windshield opening must be covered with ¬Ĺ‚ÄĚ x ¬Ĺ‚ÄĚ-inch and/or 1‚ÄĚ x ¬Ĺ‚ÄĚ-inch wire mesh. It is also mandatory that three (3) support bars fabricated from magnetic steel tubing, a minimum of ¬Ĺ-inch diameter, be spaced equally in front of the driver and welded to the top roll cage bar and the dash bar of the roll cage in a vertical manner.
T.¬†The floor pan and firewalls must be stock in appearance and be complete on both the driver and passenger side of the vehicle (frame rail to frame rail). The front firewall must be no further back than a maximum of 12‚ÄĚ-inches behind the rear edge of the engine block. No part of the firewall or floor pan may be offset. The entirety of the firewall and floor pan must exist on the same plane (the same all the way across/from side to side) with the exception of the driveshaft tunnel. The floor pan and firewalls (front and rear) may be repaired and/or fabricated but must retain stock appearance and stock material thickness. Aftermarket firewall floor pan,and driveshaft tunnel will be permitted. Must be 18-gauge or .049-inch thickness magnetic steel.
U. Repair of the floor pan or firewall patch, if needed, must be made with magnetic steel with minimum thickness of the original in the stock location. Repair patch is limited to the repair or hole only.
V. Floorboard may be cut for the mounting of the roll cage only.
W.¬†The floor pan must have a driveshaft tunnel. Maximum driveshaft tunnel heights 8‚ÄĚ inches.
X. Firewall(s) must be sealed and complete. Open holes in the firewall will not be permitted.
Y. The front of the rear firewall must maintain the same height as the top of the front of the dashboard.
Z.¬†The maximum length of the dashboard from the front firewall to the edge of the dashboard panel will be 24‚ÄĚ- inches. Dashboard must be flat, level, and complete from left to right, front to back except for the cowl in front of the driver. Dashboard cannot be lower in height than the top of the door.
AA. The firewall must be at a 90-degree angle from the floor pan.
BB.¬†The driver and passenger compartment must remain open from left to right exposing the stock appearing/ and or aftermarket floor pan (frame rail to frame rail) and to the rear seat firewall and shelf. There may be an enclosure on the passenger side of the vehicle, a maximum of 6‚ÄĚ-inches width in from the top outside edge of the door, for the purpose of routing and covering the fuel line as it passes through the driver compartment, unless a conduit is used. Angular installations and/or cock pit type applications and/or fabrications will not be permitted.
CC. All rear decking in the car must be level from left to right. The rake of the rear portion of the interior deck can have a gradual angle from the rear of the seat to the rear of the car. NO DROPPED DECKS.
DD. The trunk floor area may be cut to allow for the mounting of the fuel cell.
EE. Exposed tubing and/or bracing outside of the bodyline of the car will not be permitted.
FF. Rub/side rails may be attached to the chassis under the body from the fender well to the rear quarter panel.
GG. A maximum seven (7) inch visor/sun shield may be added to the top of the windshield opening. The window openings, front and/or rear, driver and/or passenger side must retain their stock OEM dimensions.
HH. Mirrors of any type are not permitted.
II. Tube-type front bumpers behind the front or rear cover will be permitted. Tube-type bumpers must have capped ends. Sharp edges will not be permitted. Exposed tubing and/or bracing must not stick out further than the side of the car.
JJ. Front, rear, and/or side spoilers of any type are not permitted.

Section 8 – Wheels and Tires

A. The tire rule may be amended by bulletin at any time.
B.¬†The only approved DIRTcar tire is the Hoosier M-30 and M-60 compound. The maximum width of the tire will be 9‚ÄĚ inches.
C. The M-30 or M-60 must be used on all four corners.
D. Fully effective with the start of the weekly season.
E. Siping and grinding is permitted.
F. Grooved rear tires will not be allowed after July 15, 2024.  Effective in 2025 no grooving of tires, front or rear will be permitted.
G. Recapping of an approved tire is not permitted.
H. Any local track and/or DIRTcar officials can confiscate any tire at any time and during any DIRTcar event to be evaluated and analyzed including verification using a tire durometer. Tires may also be submitted for further chemical analysis.
I. Defacing or altering any of the manufacturer’s identification markings, letters, words, numbers, on any tire will not be permitted.
J. Any alteration of tires may result in immediate suspension from all DIRTcar racetracks and/or events and/or penalties deemed appropriate by local track and/or DIRTcar and/or World Racing Group Supervisory Officials.
L. Tire softeners and/or chemicals designed to alter the chemical characteristics of the tire and/or the tire surface will not be permitted.
M. Only 8-inch racing wheels will be permitted.
N. All wheels must be conventional one-piece magnetic steel and must be mounted with lug nuts. Aluminum, plastic and/or carbon fiber wheels will not be permitted.
O. All wheels must be fastened to the hub with five lug nuts.
P. Bead lock will be permitted on the right rear tire only
Q. Only approved wheel discs will be permitted. Approved wheel discs are wheel discs that are fastened to the wheel using a minimum of three (3), 1/4 or 5/16-inch diameter magnetic steel hex head bolts. The use of wheel discs with any other type of fastener will not be permitted.
R. Approved fastening (nut assembly) systems:

a. Keyser Manufacturing, part #100 7-101.
b. Wehrs Man. Part # WM377A-312 Aluminum 5/16 / WM377S-312 Steel 5/16
c.¬†Triple X Chassis Part # SC-WH-7810(1‚ÄĚ spring) / SC-WH-7820(1 3/8‚ÄĚ spring)
d. Pit Stop USA Part #:
e. Smith Precision Products Part # MC-516-18

Section 9 – Suspension, Suspension Components, Springs, Shocks, Steering, and Steering Components

A. All suspension components must remain stock in their OEM mounting locations for the year make and model/frame of the vehicle with the exception of racing shocks and/or springs. All suspension,front and rear end parts and mounts must be steel. Gun-drilled,hollow bolts or studs of any kind are not allowed anywhere on the car.
B. No Strut style suspension allowed.
C. Upper Tubular-type A-Frames, will be permitted.  No heim ends. Upper A-frame mount may be moved or replaced with aftermarket steel non-adjustable, non-slotted mount matching upper A-frame bolt on design. The A- Frames may be reinforced along the edges by welding round stock. Cutting and/or changing lengths of the A-Frames will not be permitted.
D. Lower A-frames must be stock/stamped OEM and not be altered or moved from their stock mounting location and must match chassis (Metric to Metric, Big Metric to Big Metric, Camaro to Camaro, Nova to Nova, etc.) Homemade lower control arms will not be permitted. Tubular lower a-frames of any kind will not be permitted.
E. Lower A-frames must be stock and unaltered. Cutting and/or fabricating is not allowed.
F. The steering shaft may be a collapsible shaft.
G. Aftermarket steering wheel and quick release are permitted.
H. Steering quickening devices are permitted.
I. Aftermarket 3-piece metric spindles will be allowed. (Speedway Part# 910345010) Pinto spindles of any type are NOT allowed.
J. Pitman and idler arms must be stock or OEM replacement stock.
K. Tubular tie rods with heim ends will be permitted.
L. Aftermarket center link will be permitted: AFCO Part# 30271
M. Bolt-in and screw-in ball joints will be permitted. Adjustable and/or truck type ball joints will not be permitted. Cutting and/or alterations to the frame will not be permitted to accept any other type or style of ball joint.
N. The lower rear trailing arms must remain in their stock OEM length, from the original OEM application and measurement system (English or Metric) and must remain specific to their chassis/frame and must be the same length on each side. Tubular arms will be permitted but MUST maintain factory length. Heim ends are NOT allowed

a. Lengths:

i. Metric ‚Äď 19.5 inches
ii. Chevelle ‚Äď 21.875 inches
iii. Impala/Caprice ‚Äď 22 inches
iv. Camaro/Firebird ‚Äď 19.3125 inches

b. The lower rear trailing arms must be mounted in the stock location on the frame. Additional holes in the rear end will be permitted.

i. Brackets can be maximum 7.5 inches long, measured from the bottom of the axle tube to the bottom of the bracket.
ii. Maximum 1 row of 5 holes for adjustment.
iii. Holes must be vertical.
iv. No additional holes in the frame allowed. Stock mount holes only. Frame mounts MUST be in stock location.
v. Slots in the frame or rear-end mounts will NOT be permitted.

O. The upper rear trailing arms may be altered (shortened and/or lengthened) to obtain the correct pinion angle.
P. Upper rear trailing arm rear end mounts must be level side to side, non-adjustable and consist of one hole on each side.
Q. Aftermarket bushings will be permitted, but the arm must not be altered in any manner. Adjustable/and or rod ends (heims) will not be permitted. No offset bushings.
R. Leaf-type springs will be permitted. Only stock OEM-type magnetic steel leaf spring(s) stack(s) will be permitted. Single leaf, mono-type-leaf and/or any type of slider and/or any composite leaf-type applications will not be permitted. Leaf springs must match chassis being ran. Camaro to Camaro, Chrysler to Chrysler etc.
S. Coil-over applications of any-type will not be permitted.
T. Aftermarket coil springs will be permitted. The coil spring location may be altered on the rear of the vehicle; however, the centerline of the axle tube may not be any further forward than the front of the spring or not further back than the rear of the spring and cannot move left or right on the rear end. Non-progressive springs only. No spring rubbers allowed.
U. Coil springs must remain vertical in their mounting application. No angled spring mounts of ANY kind allowed.
V. No suspension limiters of any kind allowed. This includes, but is not limited to, chains, straps, ropes, bump stops, etc. Shock shaft must be able to compress all the way into the shock body. Shock must move in both directions from its installed position. Shock cannot preload the spring.
W. Only one (1) magnetic steel body, non-adjustable shock absorbers per wheel will be permitted. No Schrader Valves. No piercing valves. No Bulb shocks.No air shocks.Rear shocks must remain behind the rear end housing and remain within twenty-five (25) degrees of vertical.Top of rear shock may be on an adjustable weight-jack-type bolt.
X. Front shocks must be mounted outside the spring pocket on lower A-frame; maximum one, three inch wide opening on side of spring pocket for shock clearance.Top of front shock may be on an adjustable weight-jack-type bolt. Sliding shock mounts are not allowed.
Y. Maximum 7 inch stroke on front shocks and maximum 9 inch stroke on rear shocks.
Z. All shocks must completely collapse at any time.  Shock shaft must be able to compress all the way into the shock body. Shock shaft must move in both directions from its installed position and measured at ride height. No shock can preload or pin any spring.
AA. Rear shocks may use adjustable upper shock mount.
BB. 2023 Optional Shock Program

a. For the 2023 racing season the optional shock program will continue.
b. The DIRTcar optional shock program will be administered as follows.

i. The shocks will be manufactured exclusively for DIRTcar Stock Car competition by AFCO.
ii. The AFCO optional shock will be available in 2 lengths and 6 valving options; the front shocks will have a 7‚ÄĚ shock body and the rear shocks will have a 9‚ÄĚ shock body. Each shock will carry a DIRTcar numbered tamper proof decal and an etched AFCO serial number. The 2023 cost of the shock to the competitor will be $209.00.
iii. The shocks can be purchased directly from AFCO.  Order 1-800-632-2320.
iv. The DIRTcar Stock Car division Official(s) will also have a quantity of the approved AFCO shocks for comparison to a Competitor(s) shock to confirm the shock(s) conform to the approved specifications.
v. As a bonus for purchasing a 6-shock package, the purchaser will receive an AFCO product certificate for one free DIRTcar 79 series shock to be used anytime throughout the 2023 season.

CC. Weight jacks will be permitted.
DD. Hydraulic ratchet and/or electric weight jacks are not permitted.
EE. Only stock/STEEL type OEM brakes will be permitted. Disc brake(s) will be permitted on the rear brake(s) provided that the rear brake caliper(s) match the front brake calipers. Alterations to the rear brake rotors, to fit the rotor to the rear only, will be permitted.
FF. All four corners must be in working and operating condition prior to and following the completion of competition. Aftermarket brake pedals will be permitted. Brake bias adjusters are permitted.
GG. All four wheels must be able to stop/brake at all times.
HH. No Scalloped rotors of any kind on any corner.
II. Suspension components that are adjustable within the driver compartment of any-type will not be permitted, aside from brake bias adjusters.

Section 10 – Personal Safety Equipment

A. General

a. Each competitor is solely responsible for the effectiveness and proper installation, per the manufacturer’s specifications, of personal safety equipment and determining it to be adequate for competition at every event. Each competitor is expected to investigate and educate themselves for continuing improvement regarding their own personal safety equipment.
b. Different safety regulations may be in place depending on the local and/or state government rules and/or laws and/or regulations in the specific location of the racetrack. Helmet and seatbelt dates and/or specified equipment requirements, worn, utilized and/or otherwise may be different than specified in the rulebook. Contact your local track officials for more information regarding this.
c. Each division section will cover the General and Specific Safety and Personal Protection minimum requirements. All participants are solely responsible to meet the requirements in the specific division.
d. Only SFI 45.1 roll bar padding may be used. Knee, steering pads and/or additional padding may be utilized.
e. All teams should have an easily accessible fire extinguisher or its equivalent in the team’s pit area.

B. Seat Belts and Restraint Systems

a. Each car must be equipped with a minimum of an SFI 16.1 or SFI 16.5 approved restraint system. Restraint system will be eligible for use in competition until the expiration date or for 2 years from the date of manufacture. Seat belt restraint systems shall be installed and used in accordance with manufacturer’s instructions.
b. In any type of manufacturer’s installation, the fasteners must be as supplied by the manufacturer.
c. Seat belt material should not be permitted to come in contact with any sharp or metal edge, including when the material passes through the seat.

C. Protective Clothing

a. All drivers will be required to wear a fire-resistant driving uniform meeting the minimum of the SFI 3.2A/5 specifications and display a valid SFI 3.2A/5 label on the outside of the uniform.
b. Drivers must wear gloves at all times they are on track. Driver’s gloves must meet or exceed the SFI 3.3 specification and have a legible and valid SFI 3.3 label.
c. Drivers must wear shoes that meet the minimum of the SFI 3.3 specifications and display a valid SFI 3.3 label.

D. Seats

a. All current seats must be full containment type constructed of aluminum or approved carbon fiber and must adhere to the general design specifications of SFI 39.2 seat construction standards. Design shall include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam.
b. Carbon fiber seats must have a current valid SFI 39.2 certification.
c. SFI 39.2 seat compliance for the World of Outlaws Late Models, Super DIRTcar Series, 358 Modifieds and DIRTcar Late Models will become mandatory at a future date.
d. SFI 39.2 seat compliance for the DIRTcar Pro Late Models, UMP Modifieds, UMP Pro Modifieds, NE Sportsman will become mandatory at a future date.
e. Up fitting a current seat with bolt-on kits will be permitted with a seat manufacturer produced kit and an acceptable base seat approved by the seat manufacturer. Components must include a comprehensive head surround, shoulder and torso support system, and energy impact foam. Must be installed in accordance with the seat manufacturer’s instructions. Combining components may not meet SFI 39.2 Certification.
f. Seats must be used as supplied and installed following instructions provided by the seat manufacturer.
g.¬†If the left side head surround is 7‚ÄĚ-inches or less when measured from the back of the headrest, then a left side head net meeting the SFI 37.1 must be installed with a quick release latch. A minimum left side head surround of 4‚ÄĚ-inches is required.

E. Helmets

a. All drivers must wear a full-face helmet with a minimum safety rating of FIA 8860-2010, FIA 8860-2018, Snell SA 2015, Snell SA 2010, Snell SAH 2010 and/or a valid SFI 31.1/2005 label.

F. Head and Neck Restraints

a. Drivers, at all times they are on the track, must have their helmets correctly (following manufacturers installation and use instructions) connected to an approved head and neck restraint.
b. The head and neck restraint must be SFI 38.1 approved and display a legible and valid SFI 38.1 label.

G. Fire Suppression

a. Required for DIRTcar Late Models, Super DIRTcar Series, DIRTcar Big Block Modifieds, DIRTcar 358 Modified, DIRTcar NE Sportsman and DIRTcar NE Pro Stocks. It is recommended for all other divisions.
b. All racecars shall be equipped with a thermally deployed automatic fire suppression system. The fire suppression system will consist of a DOT approved cylinder manufactured from aluminum or steel with a capacity of ten (10) lbs. of fire extinguishing agent, steel or steel reinforced lines, and has a minimum of two (2) thermally activated discharge nozzles.
c. All systems must meet or exceed SFI 17.1 specifications.
d. Systems must be fully charged with ten (10) lbs. of DuPont FE-36, 3M NOVEC 1230, FireAde or 4Fire and display a legible and valid SFI and manufacturer label depicting fire extinguishing agent, capacity, and certification date. Cylinders that are beyond useful certification date must be inspected, serviced and re-labeled by the manufacturer.
e. Cylinders must be mounted forward of the fuel cell. Cylinders must be securely mounted to the frame/roll cage assembly. The certification label must be unobstructed and easily accessible for inspection when the mounting is complete. For systems with one activation point, the activation point may be mounted in the cockpit or rear of the car close to the fuel cell.
f. The cylinder must be connected to the nozzles with steel or steel reinforced lines.
g. 2 (two) thermally activated nozzles must be used. One (1) nozzle must be located directly above the fuel cell in the fuel cell area and the second nozzle located in the driver cockpit area.
h. An optional manual override cable is recommended for two (2) thermal automatic nozzle systems but is mandatory for systems with one (1) activation point.

H. Other

a. No sharp or protruding edges in or around the driver compartment, which would impede the driver’s rapid exit from the car.
b. Windshield screens with a minimum of .090-inch screens must be securely fastened
c. An electrical engine shut off switch is required. The switch must be clearly labeled and within the reach of the driver.
d. A fuel shut off valve is recommended and should be utilized. The valve should be clearly labeled and within reach of the driver. The fuel line must not enter the driver compartment.

Section 11 – Drawings