1. Hearses, limos, Chrysler Imperials, Imperial sub frames, suicide door Lincolns, SUV's, and Sedagons are NOT allowed.
2. All cars must be stripped of all glass, body molding, door handles, and all exterior lighting. The interior and trunk area must be cleaned of anything that could injure driver during derby
3. The fuel tank must be removed from car. A 5 gallon boat fuel tank or another safe type of tank can be used and must be relocated to the inside of the car, covered and must be secured to prevent it from coming loose during the derby.
4. The battery must be removed and relocated to the inside of the car, covered and secured to prevent it from coming loose during the derby
5. The radiator must remain in the stock location or can be removed completely. Electric fans are allowed.
6. All doors must be chained, welded, or wired closed to prevent from opening during the derby. Metal straps can be welded to the door seams with a 3 inch wide x 1/8 thick max. Round metal rods may be used in the door seams with a 5/16 max. Sire of wire is #9 with 4 wraps max. The top of the door in the rain channel must remain unwelded. The door seams from top to bottom can be welded solid. The bottom of the door seams can be spot welded but not more than 1/2 total welded. No wiring roof to floor, windows to floor, or anywhere inside car If you have a light colored car, door mst be red. If car is dark colors, the door must be white. Inside car door seams can be welded, but not more than half total welded with no welding at the top or bottom.
7. Hoods must have hole cut about carburetor. Electric fuel pumps are allowed if the switch controlling the shut off is mounted on the dash bar to the left of the steering wheel. A master shut-off switch shutting off the electrical system to the whole car is recommended. Hoods can be bolted in 4 places max with 1 inch max diameter bolts or allthread. Metal plates between nut and hood have a 6x6 by 1/4 max.
8. Wire can be used to tie 4 wraps per hole. Chains can be used with 2 wraps per hole, but links must remain unwelded.
9. Trunks can be welded shut. Metal straps can be used 3 inches wide x 1/8 max. Round metal rods can be used in seams with a 5/16 max diameter. #9 wire can be used with 4 wraps per hole. Metal plates between nut and trunk have 6x6 by 1/4 max. Trunk can be bolted in 4 places max. If official needs to look in trunk, a hole must be cut in trunk. Tucked trunks are subject to having to be approved by tech official. Trunk cannot be welded to the bumper.
10. Bolts and or allthread used to hold body or sheet metal has a 1 inch max diameter. Metal plates that hold hood, trunk, or body have a 6x6 1/2 max.
11. Bumpers can be welded or chained to prevent from coming off during derby, however metal straps may not be used to weld bumper to trunk or fender, also bumper cannot be directly welded to fender or trunk or any car body panel. If bumper is welded, not metal can be added. If chained, chain links must remain unwelded. Bumper brackets can be removed and bumper welded to frame but no extra metal can be added. Homemade bumper brackets are subject to be approved by tech officials.
12. Bumpers must remain in stock location on frame (up and down) and can be no more than 30 inches from ground (center of bumper to ground). There is a 21 inch minimum bumper height for wedges.
13. The frame seams can be welded but only on top and bottom seams of frames only. The holes in the frame must remain unwelded. No adding of metal anywhere on frame allowed. The body cannot be welded to the frame (If your body is welded to your frame, you will not be allowed to derby and will be loaded on the trailer and will not be allowed to cut weld loose).
14. Front and rear suspension must have ample movement (tire bounce is not ample movement). Springs and shocks must move freely. The rear control arms cannot be boxed, if you lengthen the rear control arms they are subject to tech officials approval. Slider drive shafts can be used.
15. Changing from coil to leaf springs is not allowed. Chaining of rear humps is not allowed.
16. Not adding of metal to any frame, body or suspensions allowed. No reinforcement of front end, read end, radiator support, renders or anywhere on car. Any rust patching on body panels are subject to tech officials approval.
17. Transmission coolers are allowed, but no electric fans on transmission coolers allowed (if transmission cooler has an electric fan, you must remove it completely from the cooler before you are allowed to derby, you cannot just cut the wires). If transmission cooler is mounted inside of car, it must be mounted in a safe manner behind driver and secured as to not come loose during derby (by installing transmission cooler inside car, the driver knows and accepts the risk of injury or death and will acknowledge this on the release of liability form).
18. Max tire size is 16 inch. No 3/4 or 1 ton rear ends allowed. All cars have a 5 lug bolt limit. Rear gears can be welded to make pos traction.
19. No metal plate or tube can be welded on outside of car. A metal tube can be installed across dash area. A metal tube can be installed behind seat (the metal tube behind seat cannot be more than 8 inches behind front door seam). A metal tube can be installed along driver and pass door on the inside that's welded to the dash and behind seat tub (the bottom of the door bars must be a minimum of 10 inches from the bottom of the inside door seam). No bar, tube or plate can be attached to the floor board or frame. Welding tubes or bars is recommended. If the cage or tubers are bolted the nuts must be on the inside of the car (head of bolts on outside of car - nuts on inside of car). A roll bar is allowed. The roll bar cannot go to the floor pans, frame or anywhere on car body (the down bars on the roll bar must be a minimum of 10 inches off the floor pans and it is recommended to be welded on top of the behind the seat bar). The roll bar can go from the behind seat bar up over driver and connect to the dash bar, but cannot be welded or bolted to roof. Roll bar can go from behind seat bar up over roof of car and back in to the behind seat bar.
20. Foam spay is allowed in limited use around radiate only. No foam spray can be used in fenders, doors, frames, trunks or hoods. If an official thinks you used foam spray in excess, you will have to remove it before allowed to enter derby.
21. All drivers will use a DOT approved helmet and use seat belts at all times. Fire pants and jacket are recommended.
22. All cars must have working brakes.
23. All cars are subject to having a small hole cut or drilled in car body and/or frame if tech official has reason to check area in question.
24. Only one person per call is allowed at the tech booth area when cars are being teched. This rule will be strictly enforced.
25. Just because it is not listed in these rules does NOT make it legal. If you are not sure about a rule, contact us before you do it. Not having a copy of rules is not an excuse.
26. All cars must pass inspection before being allowed to derby.
27. Officials and tech inspectors have final decisions on all rules!
28. Building your cars to these rules does not make demolition derby's safe. These rules are to help make every car have a fair chance to win. These rules are not for driver's safety. You enter these demolition derby's at your own risk with the understanding that you could have injury, hard, or death, and will acknowledge this on your release of liability for.
29. If your car is flagged after inspection, your car is still open to inspection at any time before, during, or after the derby at the discretion of any Derby Madness tech or promoter.

1. When an official blows horn and/or waves flag, all cars must stop immediately.
2. No intentional driver door hits allows. If official thinks it was an intentional hit, you will be disqualified immediately. If accidental you will be warned one time, the next time you will be disqualified, you can also lose points and be disqualified from the Napa Derby. Do not use your driver door as a shield.
3. No teaming during heats or feature race. The cars teaming up will be warned one time, second time all cars teaming will be disqualified. You can also lose points and be disqualified from the Napa Derby.
4. You have one minute from last hit to make another aggressive hit. This means no sandbagging. First time you will be warned, second you will be disqualified. You can also lose points and be disqualified from the Napa Derby.
5. If your car dies, gets stuck or has any problems you have two minutes to get your car running and make an aggressive hit. If your car gets pushed over bank or logs, you have two minutes to re-enter and make an aggressive hit.
6. If your car catches fire, firemen will put the fire out. When officials restart derby, if firemen and officials believe your car is safe to derby, you have two minutes to start car and make an aggressive hit. You cannot start car until derby resumes. If car catches first a second time, you will be disqualified.
7. If your car turns over, officials will stop derby and try to turn your car back on its wheels. If car will start and run, you may continue derbying. You have two minutes to start car and make an aggressive hit. You cannot try and start car until derby resumes.
8. Rules 1 thru 6 of Running of the Derby Rules will be for officials to decide. Drivers, crew members, family, or friends cannot confront officials. Every driver is responsible for his crew, family, and friends. Confronting an official can result in disqualification of your car. You can also lose points and your qualification in the Napa Derby
9. All cars will have numbers on both front doors. Duplicate numbers will be decided by first car through tech with that number.
10. NO ALCOHOL IS ALLOWED IN PITS. Any driver thought to be under the influence of alcohol or drugs will not be allowed to participate.
11. No fighting allowed. No profanity allowed.
12. No children allowed in pit area unless accompanied by an adult. Your children are your responsibility, so for their safety keep up with them. All minors between the age of 14 and 17 must have a parental consent form signed prior to entering the pit area. No minors under the age of 14 are allowed in the pit area. 
13. There will be a protest fee for derby cars. Protest fee is $200.00. If protested car passed protested inspection, car keeps first place winnings. If car fails inspection, then the driver loses their first place winnings and second place car takes first place money. If car passes protest, protester will lost $200.00 fee. If protested car fails, protestor will receive $125.00 of protested fee back. Driver in heat or feature can protect car in same heat or feature only. The protestor must announce which part or which item of the car they are protesting, not just the car in general.
14. All drivers must attend the drivers meeting. Drivers not attending will not be allowed to participate.
15. At the officials discretion, a driver can have points and/or Napa Derby qualification taken away and/or be banned from future derbies if a rules violation deems such action.
16. If you cannot run due to an illegally prepared or loaded car, your entry fee will not be refunded and you will lose your qualification, if you already have one, for the Napa Crash for Cash Derby and will have to re-qualify to make the Napa Derby.
17. Entry fee includes one car and one driver.
18. All drivers must wear a helmet, safety glasses, and seat belt while in their car.

Tech Information
Mike Weatherford
(731) 642-4992
(731) 782) 3234
mike.weatherford@derbymadness.com