Track rules are listed below class rules.

Crate Racin’ USA Weekly Late Model Rules

This class will be governed by the sanctioning body’s rules available at:

RULES:

https://weeklylatemodels.crateracinusa.com/downloads/get.aspx?i=999830

BODY DIAGRAM:

https://weeklylatemodels.crateracinusa.com/downloads/get.aspx?i=999831

Open Wheel Modified Rules

We will be running USMTS/USRA rules with the following exceptions:

1. Any Hoosier G60 or American Racer KK704 tire is allowed. Grooving and siping of tires is permitted. 

2. Five (5) inch spoilers are allowed on all cars. 

USMTS rules are available online at:

https://usmts.com/ClientFiles/Downloads/2025-USMTS-Rules.pdf

Crate Racin’ USA Street Stock Rules

This class will be governed by the sanctioning body’s rules available at:

RULES:

https://streetstocks.crateracinusa.com/downloads/get.aspx?i=1099567

BODY DIAGRAM:

https://streetstocks.crateracinusa.com/downloads/get.aspx?i=1062555

2025 Class Rules

 2025 FACTORY STOCK RULES  

 These rules are to tell you what you can do. If it is not in the rules and you do it, it is NOT LEGAL unless  cleared by tech-inspector.   The Statement: Unless it came on a stock, mass produced vehicle, it is NOT LEGAL  UNLESS SPECIFIED  HERE! If it came on a stock, mass produced vehicle and it is prohibited here, it is NOT LEGAL! All  dimensions are referenced as the car is raced. Your tire pressures, spring settings, etc. May put your car  out of limits. No variances are allowed when / if the cars are checked / weighed going onto the track.   Following the race, decisions on variances for accident is at the discretion of the Tech Inspector(s).  

 RELATIONSHIP TO OTHER CLASSES:   These cars are primarily for NEWER drivers to V8 cars. There are a large number of stock parts.  

  ELIGIBLE MAKES/MODELS:   Any Chrysler, Ford or GM model car that was / is mass-produced for the United States Market. Check  with track before you build.   MATERIALS:   No ceramic or carbon fiber parts allowed. 

 RADIATOR:   One, mounted in front of the engine for the purpose of cooling water and, optionally, to cool an  automatic transmission. 

  ENGINE:   Location: Stock location for Make / Model / Year.   Option 1   GM CAP SEALS or GEN-4 Green Crate Racing USA Seals ONLY. If Bolts or Seals are altered, you will be  DISQUALIFIED. (Must run 500cfm Holley 2 barrel) If you put a 602 Crate Motor in any other chassis  besides GM, contact Tech Man for engine location.   
Option 2   NO MORE than 180 lbs compression.   BLOCK: Stock based, steel, small block not to exceed 364 ci. No 400 ci engines Must be stock bore (+60  okay) and stroke. NO stroker / hybrids (No 383ci Chevys, No 347 Fords, ect.) All engine casting numbers  stamped on the engine must be unaltered.   CAM: Chain driven. HYDRAULIC OR SOLID ; NO MORE THAN 450 LIFT MEASURED AT INTAKE   Any cam other than 450 lift must pull 16 inches of vaccum.@ 1000 RPMS!  NO VACCUM PUMP ALLOWED!

 LIFTERS: Solid or hydraulic. No rollers or mushrooms. No ceramic.  

 PISTONS: Dished or Flat top only . No Domes.   

RODS: OEM length. Example: SBC must be 5.7” I-Beam Rods No 6” rods. No H-Beam rods. May use  aftermarket part numbers only   SCAT # 2-ICR5700 OR EAGLE # SIR5700BBLW OR STOCK GM  NO HBEAM  OR LIGHTWEIGHT RODS  

 HEADS: OEM iron heads. Vortec heads okay, Vortec copy okay. Not to exceed 173 intake runner volume.   No Porting or Polishing. OEM style stamped steel rockers. No roller rockers. No roller tipped rockers.  Screw in studs and guide plates OKAY. No Porting/ Polishing.   

VALVES: Maximum of 2 valves per cylinder. Max intake is 2.02. Max exhaust is 1.600.    CARBURETOR: One carburetor 500 cfm two barrel Holley with stock, unaltered, throttle arm and  butterflies. Choke plate may be removed. No Porting or Polishing. MUST PASS GO/NO GO gauge. The  accelerator pump squirters may not extend into the area directly above the venturi (Tech Purposes).   Recommend Epoxing the boosters for safety. MUST HAVE CHOKE HORN  No 4412C,4412CT,4412HP    Holley Ultra XP series carburetors “polished aluminum type with choke horn omitted”   

 CARBURETOR CLAIM: Any car owner of a car in the FEATURE RACE may claim the carburetor of any car  finishing ahead of the claimers car, in the FEATURE RACE for $300 and swap of claimers carburetor. Only  1 Claim per year. (Tech Inspector(s) will have final say so if carburetor is in shape to swap).  

 INTAKE MANIFOLD:   No Porting / Polishing. OKAY to drill the intake, to mount on Vortec heads. Any cast  iron or aluminum  intake. Dual Plane Intake ONLY. 

  CARBURETOR ADAPTER / SPACER:   No more than 1 adapter and no more than 1 spacer, a combined total of 1” thick. May be Aluminum,  Wooden or Plastic. Cannot extend into manifold.  

 AIR FILTER HOUSING:   No vacuum lines allowed between the air cleaner and the carburetor. Only one, round, mass produced  air cleaner may be used. Maximum size of the element will be 14” in diameter by 4” tall. Air cleaner top  and bottom must be made of solid metal. NO PLASTIC AIR HATS.  

 IGNITION:   Battery operated. OEM electronic ignition system such as HEI required. Distributor must be mounted in  the stock location and maintain the stock firing order. No crank / triggered ignition. No ignition boxes. NO MSD REV BOX ALLOWED!!!  CRANKSHAFT:   OEM crankshaft or OEM replacement cast or steel crankshafts only. Scat #9-10442, Scat #9-10526, Eagle  #103523480, Stock stroke. No lighting, no knife edge, no polishing. Must Weigh 48lbs without gear   

 ALTERNATOR:   If used, must be 12 volt and of OEM design. 

  HARMONIC BALANCER:   After market to include fluid damper okay. 

  NUMBER ONE PLUG:   Must be at stock location for make and model. Engine has to be in stock location on frame. ZERO  ENGINE SET BACKS.   

STARTER:   Full size or Mini Starter okay. MUST HAVE STARTER. 

  WATER PUMP:   After market okay. 

  POWER STEERING PUMP:   Stock location. : After market power steering pumps and steering quickeners are okay.   

ACCESSORIES:   Other items must be OEM style but may be after-market items.   PROHIBITED:   Any titanium or other similar sophisticated lightweight parts. Mounting the engine so that the centerline  of the crankshaft is more than 1” from the center point between the 2 top ball joints.  

 FUEL:   Racing gasoline OKAY. NO E 85. No aftermarket additives. No cool cans. See the safety rules on the  required fuel cell.  

 EXHAUST:   Must exit approximately parallel to the ground and not be aimed in the direction of the cockpit. Headers  OKAY with 1 5/8 inch primaries and 3” collectors. No over the frame or crossover headers.  Turndowns  recommended.  

FLYWHEEL/FLEXPLATE:   OEM steel only. OEM dimensions   

CLUTCH/TRANSMISSION:   Single disc clutch only 10 1⁄2” minimum. No aluminum flywheel. Stock type flywheel to weigh no less  than 14lbs., stock type pressure plate no less than 13lbs., stock disc type clutch and flywheel required.  Stock torque converter 11” minimum required with automatic transmission. Transmission may have  shift kit installed, 1⁄4” steel plate surrounding stock bell housing or blow proof bell housing required. No  racing clutches are light flywheels, or small torque converters, or racing torque converters are allowed.  Functioning torque converters must weigh 38lbs minimum. 

  DRIVE SHAFT:   OEM steel. Universal joints are to be similar in design to OEM units.   

REAR END:   Ford 9” OKAY in any make. When using 9” Ford make sure brackets are 3” maximum from bottom of  rear end housing to center of control arm bolt. Must be the same both sides .  . IF any questions about  stock location, call track BEFORE you weld brackets on. OEM 5 or 6 lugs OKAY, consider installing C-Clip  eliminators or other provisions such as that breaking a rear axle does not cause the axel to come out of  the housing. 

BRAKES:   Minimum of 2 rear and 1 front brake. No floating brakes.   Dual Master Cylinder OK. No Brake Bias.  

 BATTERY:   May use 2 batteries. If battery is located in drivers compartment it must be in an enclosed battery box  and securely fastened. No bungee cords or ratchet straps. NO EXCEPTIONS. Must power the starter and  the ignition and any accessories.   

CHASSIS:   OEM for Make / Model / Year of the body.  

 WHEEL BASE:   Must be as manufactured for the Make / Model / Year. Minimum Wheel Base 108”. A one-inch tolerance  may be allowed at the direction of the Technical Inspector for accident damage the day of race.  

 STEERING:   OEM style for Make / Model. No Rack and pinions unless OEM Equipped.   SHOCKS: Steel body shocks, stock mount, non-adjustable shocks. No heim ends allowed $300  shock claim rule.    The $300 claim is for all 4 shocks and claiming car must be on the lead lap. Can only claim or be claimed  once in a season.  

 FRONT SUSPENSION:   Upper A-arm and all steering linkage may be reinforced as long as their identities remain clear. Factory  spec upper control arms with lengths of eight (8) inches or eight and one-half (8.5) inches are permitted.  Upper A frames must be within one inch of OEM offset. May use stock dimension tubular upper A-Arms  must be mounted in stock location on chassis. OEM style and dimensions racing shocks allowed.  Aftermarket ball joints are permitted but must be stock OEM dimensions. Rebuildable ball joints are  permitted. Upper ball joints may be any height but must be in the stock location.  Shocks MUST use the OEM mounts and remain in their OEM location. NO SCREW JACKS. No Bump Stops  or Shock Covers. NO SPRING RUBBERS. NO SPRING BUCKETS. NO CHAINS, NO CABLES, or NO TETHERS  allowed anywhere on chassis or suspension.   OEM style and dimension racing springs allowed. Springs must remain in their stock mounts and  locations. For coil spring cars you may use 5” springs. Chrysler torsion  bar suspension is permitted if it  was stock on the year and model designated for the car. No driver adjustable suspension devices  permitted. Spindles  “3piece Spindles” and lower control arms MUST BE STOCK to the chassis being  used. Also, upper control arms, spindles and lower control arms must be in STOCK LOACTION for  chassis being used. NO limiting of suspension up or down  

  REAR SUSPENSION:   OEM. Shocks must use the OEM mounts and remain in their OEM location. NO SCREW JACKS. No Bump Stop or Shock Covers. OEM style and dimension racing springs allowed. NO SPRING RUBBERS. . NO  CHAINS, NO CABLES, or NO TETHERS allowed anywhere on chassis or suspension. Springs must remain in  their stock mounts and location. Center bolt of the Lower Rear trailing arms cannot no more than 2.5  inches from the bottom of the axle tube must be even For coil spring cars you may use 5” springs.  Chrysler torsion bar suspension is permitted if it was stock on the year and model designated for the car.  OEM design leaf spring setups in which the springs are securely fastened to the rear end are OKAY. No  driver adjustable suspension devices permitted. No “Z” links, aftermarket pan hard bars, aftermarket  Jbars, torque links, torque arms, damper shocks, fifth coils, ECT. NO limiting of suspension up or down   SPRING BUCKETS O.K.  SPRING MAY NOT EXCEED INTO BUCKET MORE THAN ¾ OF A INCH FROM THE  FLAT PART OF THE ORIGINAL SPRING PERCH   TRACTION CONTROL:   Other than listed under REAR SUSPENSION, no other traction devices are permitted.   BODY:   MUST HAVE COMPLETE BODY   OEM production body or sheet metal body OKAY MUST LOOK STOCK APPEARING (WE WILL NOT LET  THIS GET OUT OF HAND). Complete stock body, unaltered except as stated here. Hoods may be gutted.   Firewall can be stock or fabricated and must be in the stock location. No open holes in firewall (seal  Penetrations). Maintain the floor from firewall rearward to the leading edge of the trunk. There must be  a firewall between the driver’s compartment and the trunk. Car must be sealed at the back of back seat  frame work. floor pan and fire walls can be fabricated with the same thickness of steel as stock “ 20  gauge “ and must go from stock frame rail to stock frame rail no aluminum   NO decking allowed, must  have open cockpit from firewall to rear firewall. All doors must be welded and / or bolted shut. Doors  may be gutted. Install 3 driver’s sidebars, with 1/8” steel plate covering the door bars from front to back  and top to bottom welded in place on outside of bars (Strongly Recommended). Install a minimum of 2  right side bars. The frame rails do not count as the door bars. See the safety rules for other items. Front  inner panels optional on shock cars, required on strut cars. Trunk lid may be gutted. All glass must be  removed. No mirrors. Grill may be replaced with wire mesh. Must have stock bodylines. Must have a  metal firewall between driver and fuel cell. No fuel line in driver’s compartment unless contained in  conduit / pipe. Fenders may be cut for tire clearance. Front fender well may be removed. The rear of the  car must be closed in. Rear of car must have downward slope from back of rear glass to back of trunk lid  or tail piece. Rear deck height 40"on hung bodies (minimum 35") CAN BE MEASURED ANY TIME NO  TOLERANCES   NOSE / GRILL:   Aftermarket plastic nose for Make / Model OKAY. Front grill may be removed if such nose is installed.  MUST Match Body/ Year Model.   Hood:   May have an opening for the air cleaner. The claimed engine size must be displayed on each side of the  hood reading from the closet side of the car. Use letters at least 3” tall with the length proportional to  the height.   ROOF:   Stock appearing. No spoilers or wings. The left and right edges of the roof are to be approximately the  same height from the top of the doors and quarter panels. No more than 1” tolerance. The left and right  side support panels for the roof must be the same design and front to back length.   INTERIOR:   See the section on SAFETY.   No part of the seat may extend rearward past the plane generated by connecting the rear most edges of  the doors. Aftermarket GAS pedal OKAY. (May be relocated). Must retain OEM window openings.  

 TRUNK LID:   Required. May be gutted. Must be able to be opened.   REAR BUMPER:   Any Make / Model OEM OK. Fabricated OK if approved by Tech. Ends must be smooth. Must be  attached to the frame or roll cage in at least 4 places, 2 on each side of centerline.   SPOILERS:   Not allowed, PERIOD. (If your car came with one take it OFF).   WHEELS:   15X8 Steel wheels only. No wide fives. Must mount with at least 5 lug nut design. Mud caps OKAY. Bead  Locks may be run in any location .   TIRES:   Hoosier H500 or American Racer Stocker HARD or American Racer AR500 Xtra hard or 60 Series Radial  D.O.T. NO MUD GRIPS. NO GROOVING TIRES. NO CHEMICAL ALTERATION ON TIRES.   WEIGHT:   All cars must weigh 3200 pounds with driver on board.   ALL BALLAST MUST BE PAINTED WHITE AND HAVE CAR NUMBER ON IT    ABSOLUTELY NO BALLAST CLAMPED OR BOLTED TO THE REAREND HOUSING    IF YOU FEEL YOU NEED TO TEST THESE RULES, MAY BE YOU SHOULD START IN STREET STOCK. GOOD  LUCK IN POST RACE INSPECTION     

NOTE: Any interpretation or deviation of these rules is left to the Mitchell's Motorplex officials

Any decision of and by Mitchell’s Motorplex officials is final. Any unsportsmanlike conduct can carry a minimum $100 dollar fine and/or suspension. 

Car must meet satisfaction of chief technical inspector for integrity and safety each night before allowed on the racetrack.

DISCLAIMER

The rules and regulations set forth are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events and by participation in these events, all participants are deemed to have complied with these rules.

The minimum requirements set forth may change at the discretion of the management of Deep South Speedway.

No expressed or implied warranty of safety shall result from publication of or compliance with these rules and/or regulations.

They are intended as a guide for the conduct of the sport and in no way guarantee against injury or death to a participant, or any other individuals that enter the property.

RACING IS A DANGEROUS SPORT. PARTICIPANTS AND ALL OTHERS THAT ENTER by Mitchell’s Motorplex PROPERTY CAN BE SUBJECTED TO INJURY OR DEATH. YOU ASSUME YOUR OWN RISK AND RESPONSIBILITY WHILE ON MITCHELLS MOTORPLEX PROPERTY.

Anything not specified must be OEM and remain in stock location with no modifications. 

Any interpretation or deviation of these rules is left to the chief technical inspector, any decision of and by  Mitchell’s Motorplex Officials is final.

1. RACECIEVERS ARE MANDANTORY!

2. ALL CARS MUST HAVE TOW CHAINS on front and rear of car, easily accessible to track officials.

3. No driver may get out of his/her car on the track or infield to argue or discuss the race with officials. If this rule is violated the driver may be disqualified and/or fined for the event and/or future events. ALL drivers are responsible for their crew members and their actions.

4. The speedway is private property. Through your admission ticket you have been given the right to be on this property in conjunction with racing activities. However, the management of the speedway reserves the right to revoke and cancel this right at any time that it is felt that your presence or conduct is not in the best interest of the sport of auto racing, your fellow competitors, the fans or management of the speedway.

IF IT DOESN'T SAY YOU CAN - YOU CAN'T

Bodies & Frames

1. 1969 or newer.

2. 4 point cage minimum with 3 door bars on each side – May run Full Cage. All welds and structural integrity must be satisfactory of chief technical inspector. Vent bars on both sides of the car measuring no less than 10” in length with minimum .095 thickness, 1 1⁄4” round tubing.

3. All glass must be removed.

4. All body parts must remain stock except rear bumper may be replaced by 2×2, 2×3, or round tube but must be extended no further than 5′′ from frame rails. No pointed or sharp edges of any kind. No solid stock. Rear bumper must be capped off at the ends.

5. Frame must remain complete and unaltered.

6. May skin car with sheet metal, may be aluminum (.040 minimum) or steel (24 gauge). Must retain factory steel roof panel. Must retain factory body lines for car being run. Sail panels must appear stock, no exotic panels. It must appear stock. No spoilers or side spoilers allowed. Hood must measure no less than 46” width, and 46” length. Trunk must measure no less than 44” width and 30” length. The body must be the same width across the front and the rear. All holes in firewall and floor pans must be sealed. Hood and trunk panels may be aluminum.

7. Minimum roof height is 53" and 58” max. Must measure same at front and rear of the roof panel. No sloping or angling of the roof, must appear stock.

8. Maximum distance from firewall to back of seat 59".

9. Monte Carlo nosepiece only, 78-86. Must be mounted upright like stock.

10. Back must be enclosed. May use aftermarket tailpiece.

11. Minimum door opening 13".

12. Must have stock roof.

13. Rear deck from speaker platform to back of seat may be sloped to seat bottom. 

14. No boxing of interior.

15. Rear deck height 40"on hung bodies (minimum 35") 

16. No more than 3" fall from firewall to rear of nose piece.

17. Unibody cars must tie sub-frames together in a manner that is acceptable to track officials. 18. May run aftermarket Camaro nosepiece on Camaro chassis.

Tires & Rims

1. 8 inch wheel maximum width.

2. Towel City Yellow Dot tires only, all 4 tires.

3. 1′′ Lug Nuts Mandatory.

4. Bead lock wheel on right rear only.

5. 2" or 3" offset.

6. No wheel spacers.

7. No tire alterations of any kind allowed (chemical or physical). Automatic disqualification. 

Rear End

1. Locked, limited slip, or shimmed ok.

2. Rear-end must be for make and model of car being used. 

3. Aftermarket axles are recommended.

Suspension

1. No modifications allowed

2. Stock diameter springs only , may change rate, no screw type adjusters. no racing shocks. 3. No adjustable spring spacers allowed, must be solid.

4. NO Sway bar.

5. Solid spring spacers ok, no adjustable screw type adjusters allowed.

6. Steel aftermarket upper “A” frame allowed. Non adjustable. Stock length. Stock type ball joint of stock length. No screw in ball joints. Right front uppers must be 8”, left must be 8 1/2”.

7. . Stock mount steel body Racing Shocks will be allowed starting in 2020 no take a part shocks allowed.

Rebuildable and adjustable type shocks will not be permitted.

8. Must have WORKING FOUR WHEEL brakes.

9. Four-wheel disc brakes OK. No Aluminum brake parts. No Scalloped rotors.

10. Single brake master cylinder only. No brake adjustments of any kind. No valves of any kind. No regulating of brake pressure of any kind (other than the drivers foot). Brake lines must be routed in a manner in which the complete length of line may be inspected by track officials.

11. Three-piece spindle ok- IMCA/Speedway STAMPED. No short arm 12. No suspension binding of any kind via chains, cables, etc. Suspension must be able to move freely.

13. No internal or external bump stops on shocks.

14. May change rate of leaf springs. Must mount in stock location. Mono leaf not allowed.

15. No sliders on leaf spring cars. Spacing Blocks allowed but cannot be wedge or adjustable.

16. Front frame must match rear frame 

***SHOCK CLAIM*** effective 2020

1. Any eligible driver finishing feature that is scored on the lead lap can claim all shocks for 300.00 from any of the top three drivers.

2. Only driver may claim and agree to sell or refuse. In case of multiple claims on same item, drawing will be held to determine outcome. Claim is not charged to drivers not awarded item. If first eligible driver withdraws claim, next eligible driver will be awarded claim.

3. Driver must report the claim to the Chief Technical Inspector IMMEDIATELY after the feature race and must have CASH in hand.

4. All claimed items must be removed at the track, within a reasonable amount of time (at discretion of track officials) and must leave the track under possession of claiming driver. If any driver is caught at the track claiming for another driver, both drivers forfeit all cash, trophies and contingencies for event.

5. During a claim, all shocks should be inspected for legality prior to transfer of items. If claimed item is found illegal, driver is disqualified. Claimer then has option to accept or decline claim.

6. Refusal to sell any claimable item forfeits all cash, trophies and contingencies for event.

Gas Tank

1. Fuel cell recommended, must be mounted in the center of the car.

2. Fuel lines must be routed so they cannot be ripped loose from racing action. If ran through interior of car, they must be in conduit or other protective metal casing. They must be insulated in protective casing from fuel cell to fuel pump so that the fuel line may not be damaged in competition.

3. Fuel cell must be mounted in can with two 2′′ straps top and bottom. Must have tip over valve.

4. Fuel Cells will be only 16 gallons. No larger than 26x19x13, and no thicker than 18 gauge metal.

5. Gasoline or racing gas ONLY. No Methanol or Alcohol. No Nitrous Oxide. No Propylene Oxide. No Methanol or Alcohol. No Nitrous Oxide. No Propylene Oxide. No Nitromethane. No MTBE. No E-85.

General

• ANYTHING NOT SPECIFIED IN THESE RULES MUST BE STOCK, IN ORIGINAL POSITION FROM ORIGINAL MANUFACTURER.

• All parts must have stock casting numbers.

• c.1969 or newer American made 2 or 4 door sedans with a minimum wheelbase of 108”. Frame and body must match.

• No front wheel drive cars.

• Engine must be used for make of car used, year may be interchanged.

• Stock style Moroso mounts or pedestal are allowed.

• Cross member must remain unmodified. A-arm mounts must be in stock location.

• Breather and full air filter required at all times. No air boxes.

• Stock unaltered turbo 350 or 400, metric 200 transmission only. Stock and unaltered torque converter 11” minimum. Torque convertor cannot weigh no less than 30 lbs when removed from the transmission.

• Battery must be mounted and secured in rear trunk compartment or in the front engine compartment area. 

*No Batteries allowed to be mounted inside drivers compartment area unless in a sealed marine style box * •Steering quickener or aftermarket steering box ok 

Engine

1. No aluminum engine parts.

2. Unmodified Holley part #4412 only. No modifications except choke butterfly and shaft may be removed. Choke horn must remain unmodified. Maximum 1” aluminum spacer/adapter with 1 gasket per side not to exceed .065”in thickness.

3. Unmodified cast iron 2 or 4 barrel intake manifold must be factory OEM stock. Must be factory low-rise OEM stock. No bowtie, aluminum, airgap, or marine intakes. No GM 14098242 or GM 14096242 intakes. No porting, polishing or milling allowed on any intake.

4. Headers allowed, part number SUM-G9005 or Flotech 11108FLT and Schoenfield 185 . No center dump manifolds. No crossover or “H” pipes. Exhaust must extend past driver on the short tube headers Maximum id on pipe is 1-7/8” inch. , exhaust pipe extension past driver will not be mandatory on Schoenfeild part# 185 header must have turnouts 5. No phenolic/wooden carburetor spacers.

Cylinder Heads

1. Stock production heads only and must be for 350 engine only. No closed chamber heads, no aluminum heads. No Vortec heads. No angle plug heads. The following heads are not allowed (last 3 casting#s) 040, 041, 186, 291, 292, 461, 462, and 492. Any questionable heads must be approved by chief inspector prior to racing. #EQ CH-350i Cylinder Head with 1.94 intake, 1.50 exhaust valves.

2. Maximum compression 165 lbs. (+10) with exhaust valve disabled, all plugs removed, and carburetor in full open position with a battery charger if needed. Time limit may be enforced by chief tech inspector.

3. No flow work on heads, no port matching, no angle milling.

4. Stock diameter (1.25 in) valve springs. No beehive springs. No over sized valves, max size is GM 1.94 intake 1.50 ex. Ford 351w & 302 2.02 intake and 1.60 ex. 3 angle valve job ok. No angle milling allowed.

5. Stock rockers, stock ratio only GM 1.5 ford 1.6 6. Screw in studs and guide plates ok. No stud girdle .Poly locks ok.

Block

1. Block may be bored max .060”over maximum 360 cid.

2. Stock production rods only. 5.7 only must have factory markings. Must be stock length for engine being used. May use aftermarket part numbers only SCAT # 2-ICR5700 OR EAGLE # SIR5700BBLW OR STOCK GM NO H-BEAM OR LIGHTWEIGHT RODS

3. No dome or pop up pistons. Aftermarket dish , flattop 2 or 4 valve relief pistons ok.

4. 4. OEM crankshaft or OEM replacement cast or steel crankshafts only. Scat #9-10442, Scat #9-10526, Eagle #103523480, Stock stroke. No lighting, no knife edge, no polishing.

5. Aftermarket oil pan ok. 1” inspection plug welded in oil pan 5” from front seal and 1 1⁄2” down from pan rail on drivers side. Should be between second and third pan bolt. Should not be obstructed by windage tray. Must be able to remove at the track for inspection purposes.

6. Aftermarket hydraulic camshaft allowed. Maximum lift .284”measured at the cam. Cast crank 47 lbs. minimum and steel crank 50 lbs. minimum.

7. Firing order must remain stock and unaltered, No 4-7 swaps

8. Aftermarket aluminum radiator ok.

9. Any water bottles or other cooling devices must be securely mounted on right side of car and forward of the rear- end.

10. Aftermarket power steering pump and aluminum pulleys ok.

11. Aluminum water pump ok.

Safety

1. All cars must have 5-point approved safety belts mounted by 3/8 grade 5′′bolts. 3” minimum strap width and must be manufactured within 3 years of event.

2. Approved helmet and goggles or shield. Helmet must be SNELL approved.

3. Driver’s fire suit required. Must be complete!

4. Working 2-1/2 lb. minimum fire bottle required properly mounted within reach of driver while securely seated. May not be hose clamped, taped, zip tied, etc.

5. Use a properly installed racing seat and fuel cell for safety purposes. These items will be checked for proper installation prior to going on the track by Tech personnel.

6. Drivers neck brace is mandatory.

7. Roll bar padding is mandatory on all bars within reach of any part of the drivers body while driver is properly seated in the car.

8. Drivers window net manufactured within past 5 years is mandatory.

9. Ribbon type window net only. No sprint car type or mesh.

10. Must have protective bars in windshield area forward of driver.

11. Absolutely no weight or ballast added to the car of any kind. No over sized, high gauged, or solid stock frame alterations or bumpers.

MUST START ALL RACES WITH HOOD,ROOF,TRUNK LID,FENDERS, DOOR AND QUARTERS IF YOU HAVE A BODY PART DAMAGED DURING RACING ACTION BEYOND REPAIR PLEASE SEE THE TECH INSPECTOR BEFORE YOUR FEATURE OR HEAT RACE 

Basics:

1. Must be a STOCK 4-cylinder car, 2.5L or less.

2.No turbo or rotary engines allowed. NO nitrous allowed!

3.Stock‐type fuel injection or stock manufactured carburetor only (Motorcraft, etc…). No Holley, Weber or other racing carburetors allowed. Carburetor must be stock for engine.

4. Motor MUST BE ALL STOCK and in stock location.

5. MOTORS MUST MATCH, YEAR, MAKE, AND MODEL OF CAR.

6. Any air or oil filters (K&N, etc.)

7. Stock air box ok .

8. Cold air intakes for fuel injections ok. A cone type filter is allowed and may be connected directly

to throttle body or the allowed tubes.

9. Aftermarket radiators okay – radiators can be braced for support.

10. Aftermarket (racing) headers are allowed.

11. Computer must be stock no tune or chip. Ignition coil must remain OEM.

12. You may move the battery for safety purposes.

13. Anything other than stock not stated in rules will be considered illegal and will result in

disqualification and loss of winnings, points, etc.

14. No locked differentials.

Weight Rules:

1. No weight rule.

Body / Wheel / Tire Rules:

1.  Any front wheel drive car.

2.  No all‐wheel drive cars or all wheel steer cars.

3.  Must have stock rear and front suspensions as from factory, slotting of factory mounting holes allowed.

4.  No racing springs (lowering) or shocks allowed. Springs may be heated, clamped or use spring rubbers.

5.   Springs must be within 2" of factory installed height.

   Rear control arms must be stock but may be braced / strengthened / repaired. No

aftermarket.

6. Stock type aftermarket suspension bushings are allowed.

7. Stock production cars only.

8. Mirrors are NOT allowed.

9. Must have a quality welded MINIMUM 4‐point roll cage inside the car with a minimum of 0.95”

thickness tubing

10. Mitchell's Motorplex has final say in safety of the cage.

11. Minimum 3 driver door bars / 2 side door bars – 6 or more point cages okay.

12. No push bars past firewall. Roll cage may extend forward behind bumpers. Bumpers must be

covered in some way with no exposed sharp corners.

13. NO aftermarket racing wheels allowed – Stock Only! Except right front 7 inch max width bead lock must stay within fender well.

14. Street legal DOT tires required. No drag radials, mud grip lug tires, racing tires or racing

recapped tires allowed. Directional tires are allowed.

15. Tires can be mixed and matched for stagger.

16. Aftermarket nose pieces allowed.

17. 6‐inch metal support to extend out behind nosepiece or to hold grill in place allowed.

18. No push bars to extend outside of bumpers or beyond nose piece.

19. Some sheet metal will be allowed for repairs. Cars should remain as close to stock appearing as possible. Adding sheet metal to bodies may result in a weight penalty being assessed.

20. Gutting of body is allowed.

21. RaceCeivers are MANDATORY at all times on track.

22. All Stingers must comply with track safety rules.

23. All plastic interior and air bags must be removed.

 General:     - Must be a commercially produced FWD 4-cylinder car from a known auto manufacturer   - No turbo charged, super charged or rotary engines allowed  - No all-wheel drive cars or all wheel steer cars   - Engine must be outwardly stock appearing. There is no engine teardown or protest.  - Engine must match brand of car (ex. Honda must have Honda engine). Engine swaps are  allowed.   - SCDRA has final ruling on all questions of legality. A pre-race inspection will be made to ensure  SAFETY only.   - Questions of legality can and will be answered during the pre-race inspection if asked by  entrant. No guarantee of legality shall be expressed or implied during pre-race  inspection.  Legality will be determined in POST-race inspection.   - Competitors must present cars for inspection prior to participating in any racing event.   - Mirrors are NOT allowed - RaceCeiver / RE Switch or a like device is mandatory at all times on track.  - No two-way radios of any kind allowed. Any team caught using two-way radios will be subject  to disqualification, fines and suspension.

    Weight:     - All cars must weigh a minimum of 2,200 pounds with car and driver after the race 

           Exceptions: 50 lb. weight break for HANS or like device                         

        50 lb. weight break for full containment seat    

Suspension:   - Must have stock rear and front suspensions as from factory. Any transplanted OEM  suspension or steering parts must be brand for brand and must bolt into factory mounting  holes without alteration to operate. Slotting of factory mounting holes allowed. No adjustable  aftermarket suspension components. Any adjustable OEM components must be welded to  render them non-adjustable Plating and structuring for durability and safety is allowed. - Strut towers may not be moved from original OEM position – they cannot be cut off and  replaced. Minimal repairs are allowed. - No racing springs/shocks/struts allowed. Springs may be heated, clamped or use spring  rubbers. Springs may be swapped from other models but within 2” of factory installed height. - There will be a strut assembly (to include spring and bumps or devices) claim of $200  each. Claimant keeps the parts. If the series opts to claim a strut, driver will be subject to  disqualification if found to be illegal. Claims only among the top 5 finishers. Claim must be  made with CASH in hand of tech official within 5 minutes of final checkered flag. - Rear control arms should be stock but may be braced / strengthened / repaired. No adjustable  2025 Rules  control arms.   - Stock type aftermarket suspension bushings are allowed  - Stock-type STANDARD, non-adjustable, non-rebuildable shocks / struts required - No weight jacks / cups of any kind - Suspension limiter chain or tether is allowed as a solid piece. No aftermarket limiters.  - Bump stops are allowed on struts.  Body / Roll Cage: - Must have a fully-welded, quality built MINIMUM 4-point roll cage inside the car with  minimum of 0.95" thick tubing – SCDRA Tech Official has final say in safety of the cage   - Minimum 3 driver door bars / 2 side door bars – 6 or more-point cages okay   - Minimum of 3 vertical windshield or “trash” bars in front of driver. - No part of the driver’s helmet may extend above the lower level of the roll cage halo. - Roll cage may extend forward behind bumpers. Bumpers must be covered with minimum of  8” width plastic or factory / aftermarket rear bumper cover with no exposed sharp corners.  Coverage is at officials’ discretion.   - Frame-like tubing only allowed for REPAIRS in front of front strut towers and behind rear strut  towers. No other frame-like tubing may be added to chassis.   - Aftermarket asphalt style or Five Star’s Compact nose pieces allowed. Any nose piece used  must be conformed to fit at reasonable and near-factory dimensions. Overly wide nosepieces  will have to be trimmed as per officials’ discretion. - No push bars to extend outside of bumpers or beyond nose piece.   - All bumpers (stock or tubing) must be covered and no sharp edges may be exposed  - No rub rails allowed on sides of body - Sunroofs must be closed / covered with sheet metal - No holes are allowed in the hood or front fenders and hood should cover entire engine  compartment. - Holes in firewall and floor should be covered in order to seal off driver from hot fluids or parts. - Floor pans and/or firewalls should remain intact between the front strut towers and rear  strut towers. Firewalls and floor pans may be patched with plate STEEL for REPAIRS or for fuel  cell placement ONLY. - Gutting of body above the floor pan is allowed however car should maintain reasonable  appearance of stock car.   - Driver and front passenger door window openings along with rear and front window openings  must remain open and uncovered. Front windshield visors no more than 12” are allowed. Rear  door and/or small rear side windows can be closed or covered. - No fins, wings, gurney flaps or lips are allowed anywhere on body. Properly constructed and  mounted rear mount spoilers that run from side to side are allowed within reason.  2025 Rules - Sheet metal decking should remain flush with doors and stock body lines and should not  create any lips or airfoils. There must be 2 inspection doors on decking. 1 at front and 1 at the  back. - Sheet metal roofs CANNOT be flat and should be made to closely resemble the factory roof  lines and angle. Roof pillars must also closely resemble the factory shape and lines.   - Some sheet metal will be allowed. The spirit of this rule is to keep cars remaining as close to  stock appearing as possible. Approximately no more than 1/3 of the original body can be sheet  metal – this does not include decking and/or interior. See diagram below. You can mix and  match to achieve this 1/3. Additional sheet metal not as specified may result in a 100 lbs.  weight penalty which increases by 100 lbs. at each event until corrected.    Tires / Wheels / Brakes: - Aftermarket racing wheels allowed – 7 inch maximum.  - maintain proper air  pressures. - Street legal DOT tires oo dirt racing tires required. No competition tires, drag radials, mud grip lug tires, racing  tires or racing recapped tires allowed. Directional tires are allowed.   - Tire inner tubes are allowed  - Tires can be mixed and matched for stagger on all 4 corners   - Stock-type master cylinders required. No bias adjusters or shut-off valves. - Brakes must remain stock-type and operational 4-wheel brakes. Aftermarket pads and rotors  are allowed.   Ignition / Fuel / Exhaust: - Any air or oil filters (K&N, etc.). Air intake filters must be closed on the end. - Intake must be a stock intake. Porting and polishing are allowed. No Skunk 2, etc.  - Any racing fuel or pump gas allowed - No Nitrous oxide or nitro methane mixing allowed (VP C85 is allowed)  - Stock-type fuel injection or stock manufactured carburetor only (Motorcraft, etc...).  ONE  0.800" maximum throttle body spacer may be used. Stock-type aftermarket and OEM throttle  bodies are allowed. No Holley, Weber or other racing carburetors allowed. Carbureted cars  must be stock for engine.   - No cold air intakes for fuel injections – must be stock type breather system. A flexible  rubber or plastic hose may be used in place of the stock air box tube. No smooth metal or  smooth plastic tubing allowed. A cone type filter is allowed and may be connected directly to  2025 Rules  throttle body or the allowed tubes.   - Aftermarket radiators allowed – can be braced for support   - Aftermarket (racing) header is allowed and will be subject to claim. Claim is $300 and includes  only the header itself. Claims must be made with the lead tech inspector and must be approved  by SCDRA.  - Computer may be chipped and/or tuned. A standalone ECU and aftermarket harness are  allowed. Ignition coils must remain OEM however the coil-on-plug kits are allowed.  - Racing fuel cells are highly recommended. An approved racing fuel cell must be commercially  produced with a plastic or rubber bladder as well as an outer metal enclosure. Cell should be  mounted properly as per manufacturers recommendations and it should have a rollover valve  or ball.   - The fuel rail may be aftermarket in the interest of safety. No exotic or high-capacity rails -  subject to the discretion of the lead SCDRA tech inspector. A fuel pressure regulator and/or  gauge are allowed. - Exhaust which runs through the cockpit should be fully shielded from driver with metal - Exhaust pipes must not extend out of any body surface more than 1” and pipe must be blunt  and free of sharp edges.  Safety:  - RACING helmet with Snell SA 2010 or FIA 8860-2010 certification or newer is required (no  motorcycle or DOTs helmets) (New Snell helmet standard becomes effective at the end of  2025) - Minimum single-layer fire suit required (SA 3.2A specification recommended).  - Racing shoes (SFI Spec 3.3) are REQUIRED to be worn during competition or on the racing surface. - Fire proof gloves are mandatory (SFI 3.3 specification recommended).  - A 4 or 5-point harness, properly mounted per manufacturers’ specifications, is required.  Harness certifications are good for 4 years from date of SFI certification or until marked  expiration. Any worn, abraded or torn belts shall be replaced. Harnesses should be mounted to  roll cage at all attachment points. - A minimum 5 lb. fire extinguisher or on-board fire suppression system is strongly  recommended and should be securely mounted within drivers reach. - Only commercially produced racing-type seats which are properly mounted per  manufacturers’ specifications are allowed. A full containment seat is strongly recommended.  Cars equipped with full containment seats will receive a 50 lbs. weight break.  - A head and neck restraint system (SFI 16.1 compliant) is strongly recommended. Drivers  using a head and neck restraint will receive a 50 lbs. weight reduction.  - Head and Neck Restraint certifications are good for 5 years from date of SFI certification. - Full size window nets are MANDATORY – no sprint style nets