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Rules- Street Stock Big Cars 2026

General Rules

 1. You must run the stock housing and axles for the make and model of the car. Rear end bracing is not permitted.   

2. Cars must be 100% stock! No cross breeding the entire drive line. It must be the same make as the car (Chevy to Chevy, Ford to Ford, etc). It must have the factory engine of the make and model of the car with the stock exhaust or headers. The exhaust may be cut off.   

3. The engine must be mounted with the stock mounts in the stock position. No welding of mounts. They must be bolted in. No homemade cross members. The cross member must be stock and bolted in, not welded. You are permitted an aftermarket aluminum radiator, but it must be bolted in like factory or held in with rachet straps or #9 wire. No radiator protectors or holders are permitted.   

4. You may leave the stock gas tank in the stock location, or you may relocate the fuel tank to the rear floor of the car. If this is done, you must use a fuel cell or boat tank. If it is a plastic fuel tank it must be bolted or welded to sheet metal in a steel structure. No stock fuel tanks are permitted inside of the car. If you move the fuel cell to the inside of the car it must be securely fastened to the floor with bolts and/or #9 wire and you must remove the stock tank from under the car. Ratchet straps are not approved to mount the fuel cell.   

5. The windshield may be left in the car, but it is recommended that you remove it. The following must be removed prior to entering the fairgrounds: the windows, headlights, taillights, all the chrome, and the mirrors. The interior must be swept clean of debris and glass. You must remove all glass, plastic, and fiberglass on the outside of the car including the plastic bumper covers. ALL AIRBAGS AND PUCKS MUST BE COMPLETELY REMOVED   

6. Under the hood you may take the plastic fender wells out. The battery may be left in the stock location. You may put a rubber mat over it or spray it with foam around it but not excessively. You may move the battery to the floor of the car. You may lengthen the cables to reach the battery on the floor but not the wiring harness. This will be strictly enforced.   

7. A simplified wiring harness is permitted. If the car has a wiring harness in front of the core support you may move it behind the core support. You cannot remove body mount bolt to do this.   

8. All body mount bolts must be factory stock. No altering is permitted.   

9. The doors may be          

- A.-chained or wired in no more than 8 places per door and no more than 2 double stains of wire per spot. The wire for the bottom of the doors may go around frame.         

- B.-may be welded with 2-4” long pieces of door strapping per seam        

YOU CANNOT USE BOTH OPTIONS!!    

10. Trunks must be chained or wired in no more than 8 places and no more than 2 double stains of wire per spot. Two of these may go around the bumper and/or the frame. The deck lid and tailgate must be in the factory position on the car or it must be completely removed from the car. If you removed the deck lid you are not permitted any wire for your trunk. Two (2) 8” x 8” inspection holes must be put in all deck lids within 2” of the center of the quarter panel rain channel. You cannot remove the speaker deck from the car. No welding or adding metal is permitted. If the deck lid is welded you will not run or you will cut the deck lid completely off with no exceptions. The deck lid is being measured 12” from the top of the rear quarter panels in the center of the deck lid in 3 spots starting from the back of the deck lid up. If you don’t have a deck lid, you are not permitted any wire for your trunk.   

11. Hoods may be wired or chained in 8 spots and no more than 2 double stains of wire per spot. No exceptions! You may use 5/16” chain or 2 strands of #9 wire per spot. It must be sheet metal to sheet metal only. No welding washers for holes. There must be a 12" hole in the hood in case of a fire. You must remove the hood latch. Hoods must be open for inspection. A double strain of #9 wire in the center of the front windshield is mandatory.   

12. Creasing of the body is permitted but it must be behind the back door on the quarter panels only. The quarter panels must stay the stock height of the car.   

13. Any tire and rim combos are permitted. Doubled tires are permitted. No foam filled tires or bead locks.   

14. You can have a 4 point floating cage with gussets no further than 6’’ out of each corner and the cage material no bigger than 4x4x1/4” if you choose.  You may have a rollover bar but it must run straight across and can only be welded to the top side of the rear seat bar. You are permitted a gas tank holder off the back bar that can be no wider than 24” and must be 6” away from all sheet metal. No exceptions or you are not permitted to run! These may be no bigger than 2” x 2” and the mounting plate can be no bigger than 6” x 6” and must be mounted no farther than 6” behind the driver’s seat. You may also reinforce the driver’s door as you see fit for driver safety. This may be done from door seam to door seam only.   

15. The car’s factory springs and shocks are what can be used. You can have 1- 3x3x1/4” strap to weld the upper a arm down to achieve ride height. Lower an arms must remain untouched. Screw in spring risers are permitted. No wire, chains, or any weld on the rear ends or the rear spring pockets. The front bumper can not be any higher than 21” from the bottom of the bumper. The back bumper can not be any lower than 14” from the bottom of the bumper.   

16. Any factory, loaded, and seam welded bumper is allowed with exception of chrysler pointys.  Any replica bumper is allowed except chrysler pointy replica.  Replica bumpers are to be no more than standard replica height of 6''.  No climber guards on top of the bumper or bottom.    

17. You may weld the spider gears in the rear end to make it posi. You must use factory rear end housing for the car you are running.   

18. No wire or straps can be attach from the roof to the floor in rear seat area  

19. You may have 4- 4x4x1/4’’ fix it plates on fresh cars.  Preran can have a total of 6.  Once they are welded on, they cannot be removed.   There must be a 1” gap in between plates. 1/2” weld max holding plates on.  

20. We are giving drivers the option this year.   You can pick one option but not both.  

                  1. you can run an aftermarket steering column

                                                 or

                  2. you can run aftermarket pedals.


If you decide to use the pedals as your option, they have to be bolted to the sheet metal only.  Bolts cannot run through the transmission crossmember.     

21. Aftermarket shifters are allowed. You can have a quick disconnect steering wheel but it must be attached to the factory steering column. 

Copyright © 2026 Tuf Motorsports - All Rights Reserved.


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