01/23/2026
Mod compacts General Driver Rules & Expectations
1. ALL RULES MUST BE FOLLOWED OR YOU WILL NOT RUN
2. Drivers must wear seat belt, helmet, fire suit jacket and long pants while participating.
3. All drivers must attend the drivers meeting.
4. You must run a roof sign. You cannot use the roof sign to strengthen the car.
5. Drivers are not allowed to drink alcohol before they participate. If found with alcohol in system you will
not run, no exceptions.
THIS IS NOT A SET OF RULES BUT A SET OF GUIDELINES OF HOW TO BUILD YOUR CAR.
IF IT DOESNβT SAY YOU CAN SPECIFICALLY DO SOMETHING THEN YOU CANT.
JUDGES DECISION IS FINAL! ALL CARS ARE SUBJECTED TO REINSPECTION AT ANY
TIME!
NO PAINTING OR UNDERCOATING OF THE FRAME. NO BUFFING OR GRIDING FRAMES OR
BODIES
EXCEPT WHERE WELDING IS SPECIFICIALLY ALLOWED IN THESE RULES. NO PAINTING
IN THE INSIDE OF THE BODY, SUSPENSION OR CAR. IF THIS IS DONE THE
CAR WILL NOT BE INSPECTED.
1. 2. 3. 4. 5. 6. 7. 108β max factory wheelbase on all vehicles in this class. Leave vin tag to verify make/model/year. 4-
and 6cylinder engines only. NO SUVs or Trucks. All cars must be fresh. No rear engine cars.
All cars must be stock unless modification is specifically stated in these rules.
All glass, plastic, chrome, and interior must be removed from car before arriving to the derby.
All trailer hitches and braces must be removed.
Batteries must be moved to the passenger front floorboard and must be properly secured and covered.
Factory Fuel tank, oil coolers, transmission coolers must be removed.
All cars must have working brakes when you cross the hoist. If the car is not able to exhibit the ability to
stop it will not be inspected.
No welding other than what is mentioned in this set of rules. If your car is found with any weld, other than
what is allowed, and you refuse to fix it to the judgeβs satisfaction, you and your car will not run.
Show Rules
1. 3. 4. You have 1 minute to make an aggressive hit. After 1 minute that car is disqualified. That is
1-minute total. An aggressive hit is solely at the discretion of the officials.
2. For safety, DO NOT HIT THE DRIVERS DOOR! You may not get out of your car for any
reason during the heat until you are out.
You are given 2 fires - 1st one we put out and the 2nd one you are done for that round.
Rollovers - you may keep going as long as car is deemed safe.
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5. 6. 7. Watch the officials. If they are trying to get your attention, there is a reason.
No holding or pinning, you must back up and show day light.
Car qualifies, not the driver. During the event if a driver is unable to compete and has a
replacement, please see driverβs table for the driver to get signed up and fill out proper
paperwork.
8. You must pass inspection within 3 times through or you will not be permitted to run.
9. A helmet, seat belt, fire jacket, and eye protection must be worn at all times on the track.
1. 10. If the car is found to have plate on the frame or body that the rules do not allow the car will not be
permitted to run. There will be no option to fix this problem.
11. If you hammer/shape/weld on the frame in any manner not covered in the rules you will not be able to
run. There is no fixing this.
Cage & Inside of Car
All cage material must be no larger than 6β od, unless specified for a specific rule smaller. It must also be
a minimum of 4β off the floor everywhere except the down legs going straight down. No cage material
may be within 6β of the firewall and any part of the engine or components and be a minimum of 4β off the
highest point of the floor which cannot be altered. You may weld a bar behind the seat from doorpost to
doorpost, it can be an X do not connect directly to frame, and you may also have a single bar (with no
extensions), across your dash area to replace your dash. You may run a bar connecting the dash bar and
seat bar inside of the front doors only. You may weld two down bars from the cage to the frame vertically
or to the floor to protect batteries and your feet. The front down bar must remain at the inside door seem
and may only be welded to the top side of the frame. These bars cannot not exceed 2βx3β. You must have
a roll loop behind the seat, which must be welded to the floor or frame and may be welded or bolted to the
roof. You may also weld a steering column to the cage. Side bars may be 6βx12β including roll over may
be a max overall length of 62 inches long. The roll over bar must stay within the 62 inches.
RWD cars may run down bars straight down and over to the body mount washer. These must remain
separate.
You must run a gas tank protector that must be 90 degrees straight up and down. It cannot attach to
anything other than to your cage. Cannot exceed 24β wide and must be centered in the vehicle. It can
angle in from your halo bar, it must be 4β off floor sheet metal and 1β from rear sheet metal. Must stay on
interior of car and can not be any higher than the top of the speaker deck.
A well-made metal fuel cell (no plastic tanks) is required and it must be mounted to your gas tank
protector only.
Fuel line must be ran inside the car and secured properly.
Engine oil coolers and transmission coolers are allowed. These coolers cannot be placed to reinforce the
car. Cooler mounting may be to sheet metal or cage mount only (not both).
Floor mounted pedals are permitted. They must be 2β from any body mount or cage components.
Batteries may be mounted to the cage or to the floorboard (not both). The battery box may not strengthen
the vehicle in any way. Must be a minimum 2β from, frame, body mounts, and a minimum of 6β from any
protectors.
9. Cable shifters are permitted but may not be mounted in any way to strengthen the vehicle.
Radiators
2. 3. 4. 5. 6. 7. 8. 1. When mounting the radiator, you must not reinforce the core support in any way.
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2. Radiator must be mounted in core support in factory location only. You may have an 1/8β max radiator
guard that cannot extend past the front body mount bolts. May be attached with six 3/8β bolts or four 1β
welds.
Bumpers and Bumper Mounting
Option #1: Any seam welded OEM bumper may be ran as long as it has an unmodified skin front and back. It
may be loaded, but all added material must remain inside the bumper.
Option #2: Homemade bumpers may be used as long as it falls under all of the following dimensions.
The bumper may be built up to have a 14β point from the farthest point from the back side of the bumper to the
point, however the point itself may be no more than a factory Chrysler pointy itself and spanning over a 36β span
across the bumper. They may be 8β tall unless loading an unaltered factory skin.
1. 2. 3. You may trim bumper ends or fold them around.
No welding bumper to the body or cross member in any fashion.
Bumper height not to exceed 22β to the bottom of the bumper to the ground and be a minimum 14β from
the ground to the bottom of the bumper or frame. This includes pre ran cars at the beginning of the derby.
4. 5. Bumpers must be mounted in stock location.
Front and rear bumpers may have 4 loops of wire from core support/trunk lid to bumper (not frame).
These cannot be placed in-front of the radiator.
6. No more than one set of OEM car bumper shocks/brackets may be used per bumper. Rear bumper
brackets must be OEM for the vehicle you are running.
7. 8. 9. You can weld bumper brackets/towers to the bumper and to the frame.
No brackets are allowed any further back than the first 16β of the frame.
Instead of using bumper brackets, you are allowed to use one 4β wide x 3β8β thick strap extending from
your bumper down one side of the frame and cannot extended further back than the first 16β of the frame.
You are also allowed to wrap this strap around the front of the frame 3β to create an βLβ shape, this is to
give you enough material to weld your bumper to the strap. Plate may be formed to fit the frame but it
may not be doubled up at any point. 4β width includes forming.
10. Rear Bumper Brackets must follow the front bracket rule, no longer than 14β on the frame.
Frame
1. 2. 3. 4. No frame swaps. Frame must be factory for your car.
Unibody vehicles may cut the frame off flush with the front edge of the core support / body mount hole. If
it is a weld on mount, leave the remaining portion of the body mount in place. If you remove the body
mount completely or relocate it, you will not run.
No shortening the rear rails or center of the vehicle.
You are only allowed to weld the factory frame seams from the front side of the firewall forward with a
single 1β2β bead. On a unibody car you can weld the cross member (K-member/sub frame) seams and the
main unibody seam but do not weld the two together. No welding of inner fenders, strut towers or
anything else. You may not beat the lip over and weld it (example fox body mustang)
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5. 6. 7. 8. 9. 1. 2. 3. Coil sprung cars will be allowed 20β hump plates. 1β4β thick 3β wide contoured to the frame. They must
be centered in the rear axle no cheating to one side or another. Must have 2 half inch inspection holes
drilled in them.
Rust repair - Call before fixing any rust on the frame. The rust can be cut out a piece cut exactly to the
hole size maybe butt welded in (same thickness). No restubbing cars at all
No frame shaping is allowed.
No tilting or altering of the frame in any way.
Do not shape your humps.
10. You may run 4 loops of #9 wire or 1 loop of 3β8β chain from frame rail to frame rail underneath the back
of the vehicle, behind rear end. This may go around the frame, or it may go through a factory hole in
frame, or you can weld one 3β8β chain link to the inside rail of the frame to run the wire through. This
wire may pass through the trunk floor if you choose.
Suspension and Steering
Do not re-engineer the way the steering components mount to the frame.
Aftermarket stock replacement ball joints and tie rod ends are allowed. Tie rod tubes may be reinforced.
A-arms - o Must be factory for the vehicle you are running o May be seam welded.
o Must be bolted on in a factory manner.
o May be welded or bolted down but may not be reinforced.
o If bolted, you may use one 3β4β bolt per a-arm if choosing to bolt. o If welded, you may use
two 2βx4βx1/4β straps per a-arm. This strap must be welded to the a-arm and cannot be farther
forward or backward than 1β past the widest part of the a-arm.
Struts must be factory for the vehicle you are running. Must mount with factory mounting brackets and
be stock appearing. You may reinforce the inside of the strut and are allowed one 2βx4βx1/8β strap to
weld on each strut used for height, weld to strut only.
Steering box, pitman arm, and idler arm are interchangeable with vehicles that are legal for this class.
Must bolt on in factory manner.
Spindles and hubs must be stock for a vehicle that is legal in this class. You may weld one 6βx3β4β rod to
the back side of the spindle.
Sway bar must be mounted in stock location and stock manner. No welding of sway bar or mounts 8.
No leaf spring conversions.
Leaf springs must be made of stock spring material with a 1β stagger, front and back. No springs can be as
long as the main leaf. You can have a total of 7 leaf springs per side, no thicker than 5/16β thick and 2
3β4β wide. The main leaf must be the top spring in the spring pack and lead spring must go down from
longest to shortest. You can re-clamp springs, 4 clamps per side. Homemade clamps cannot exceed
2βx4βx1/4β, while using up to 1β2β bolts. Must have a 2β arch in your springs. Must mount leafs to the
factory mounting brackets. Brackets may be welded on, do not relocate them.
10. Coil springs can be changed to a stiffer spring or put spacer in sagging coil springs. You can wire, or chain
springs to rear end to prevent springs from falling out.
11. Rear shocks may be replaced with 1β max all-thread.
12. You can loop chain or wire (1 loop of 3β8β chain or 4 loops #9 wire) from rear end to frame in one spot on
each side. Must go around frame, do not bolt chain to the frame. We are going to allow you to weld 1 link
of chain per side of frame, if you choose to weld the chain instead of wrapping it around the frame.
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13. You may use rear end of choice but must be no more than 8 lugs. Welded or posi-trac highly
recommended. Braces are welcome, may not extend more than 3β past the housing. Brace must not
reinforce your frame. Rear end control arms can be reinforced but must start from a stock set. The factory
bracket must attach in stock location for the vehicle you are running.
14. Slider drive shafts and CV shafts are permitted.
Tires/Wheels
1. 2. 1. 2. Tires no bigger than 16 inches, No split rims, No studded tires. Doubled tires and
Solid Tires are ok β we donβt want any flats! Valve stem protectors are ok. Tires may be screwed to rims.
No foam filled drive tires for the arena shows for safety reasons. Wheel reinforcement is allowed as long
as the wheel starts with a stock wheel, and the reinforcement stays within the factory bead. Bead locks are
permitted in this class. Bead locks may be no more than 20β in diameter and can be on inside of tire only.
Motor, Transmission and Engine Cross Member
You may use a 4 or 6 cylinder engine of your choice, but it must be mounted in stock location in a stock
manner.
Motor mounts can be replaced but must remain factory style. Reinforcing of the mounts is permitted but
must still have a bolt as a pivot point. Mounts may be welded solid with one 4βx6βx1β4β thick plate per
side. Mounts (other than upper FWD) must go to engine cross member, not to the frame. Top side FWD
mounts may be welded on one side but must pivot on the other (do not weld the mounts together).
Full engine cradles are allowed but must be 6β from any cage components and 6β from the core support.
All engine cradle components must be 3β away from the frame rails and body on RWD vehicles, a
minimum of 1β away from the frame rails and body on FWD cars and may not strengthen the frame in
any way. Pulley protectors are allowed but may not extend your water pump. Only 12 inches may contact
the firewall.
Transmission brace, aftermarket bell housing, aftermarket tail shafts, and skid plates are allowed.
Transmission braces must be contoured to the transmission. On FWD cars, must be a minimum 1β from
frame. Transmissions and braces must be a minimum of 4β from any cage components.
The factory transmission cross member must be in the stock location for the vehicle you are running. You
may replace the transmission cross member on RWD cars with one straight piece of 2βx2βx1/4β max
tube. Tube can be welded with a single piece of angle iron (8β long 2βx2β, ΒΌβ thick max) to each side of
the frame. You must remove the stock mount if you run the angle iron.
The transmission cross member is the only way the transmission may be tied to the frame. Transmission
may be bolted (may not be welded in any way) to the cross member with two 5β8β bolts with 1.5β washers
or you may wrap a chain around the transmission to the cross member.
3. 4. 5. 6. 7. 8. Trunk, Tailgates, Hood, Doors, and Body
1. Body shaping is allowed to the exterior of the vehicle only. All panels must remain in factory position.
Rear quarter panels and taillight valance must remain vertical.
2. You can patch rust holes in sheet metal with sheet metal only. Do not cut rust out; weld 2β beyond rust
max.
3. You are allowed 2 strands up to 4 loops of #9 wire per window opening. May go around frame and
through the roof sheet metal only. Do not use your cage in any way to support this.
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4. You may use up to four 1β2β all thread to mount your radiator. This may pass through the bottom of the
core support. You may use 2βx6β 1β8β thick flat steel welded to the core support to run your all thread
through.
5. 6. 7. No radiator or fan protectors allowed.
Body bolts can be replaced with up to 1β bolts.
K-frame cars are allowed to bolt the K-member to the frame solid with no spacer (no welding). May
have one 2βx3βx1/4β washer inside the frame and one 4βx4βx1/4β washer on top. Bolts must be up
inside the frame. If you choose to use a body mount hole for your trunk all thread, this does not have to
be up inside the frame. K-frames must be the factory one for that car.
8. If running a core support spacer, must be 2βx2βx1/4β tubing welded to either the frame or body not
both.
9. Absolutely no body mounts may be moved or added.
10. Do not shorten the front of your car.
11. Core support may not be relocated and must be bolted in factory location only.
12. Hoods must have at least a 12β square hole in case of a fire. You are allowed sixteen 3β8β bolts with a
washer of 1.25β to bolt hood seems.
13. You are allowed 6 spots to hold your hood on. Your core support all thread may go through the hood
and will count as 2 of the tie down spots. You may have up to 1β all thread, no longer than 8β. All other
tie down spots must be sheet metal to sheet metal only with a washer no bigger than 5βx5βx1/4β
flush/level with the hood to support the hood pins. 5β max floating washers to keep the hood shut.
14. Fenders may be bolted back together with no more than six 3β8ββ bolts with a 1.25β diameter washer. No
rolling your fenders and welding them. If you wrap or fold your fenders around the front of the core
support, do not exceed four 3β8β bolts with 1.25β washers to bolt together.
pipe but it can not be solid. Plates and bars must stay within 5β of the windshield opening and must be
a minimum of 3β from any protectors, threaded rod/plate and any part of the cage.
o Front Window Bar
βͺ Option #1: The front window bar can go from the top of the windshield to the bottom
of the windshield area sheet metal to sheet metal. It may be welded 6β to the top and
bottom of the window area.
βͺ Option # 2: The front window bar can attach to the roll over bar down to the front
cage bar. The window bar can not go past the front cage bar.
o Rear Window Bar
βͺ Option #1: The rear window bar may be welded 6β on top of the window area and be
welded to the floor directly above the rear axle with a maximum of 4β x 4β plate on
the floor.
βͺ Option #2: The rear window bar may be welded 6β to the top of the window area and
be welded to the speaker deck/front of the trunk lid with a maximum of 4β x 4β plate.
The rear window bar must have a 1β gap from any cage components.
16.You may weld your doors and trunk shut with no larger than 3βx1/8β flat strap (do not overlap). Only
exterior seams may be welded. If you choose to bolt or wire or doors shut, must be done in a minimum of
6 locations.
17. You may fold the tops of the doors over and weld the inner to outer (no added metal).
15.
You must have at least one window bar and no more than 2 in the windshield.. It can be no thicker than
3/8" and no wider than 3". You may use 2β x 2β
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18. You are allowed to skin the driverβs door with 3/16β thick sheet metal for safety reasons. It may not
extend further than 3β past the door seams.
19. You can fold hoods or trunk lids over. Do not slide your hood or trunk lids forward or back, trunk must
remain on hinges. Trunk lids may be shaped but must remain 8β off the floor.
20. Two 1β all thread may go from the trunk lid to the frame. You may pass through a factory body mount
hole or weld 3β to the side of the frame.
21. May use up to a 5βx5βx1/4β floating washer on top of the trunk lid.
22. Do not remove the speaker deck.
23. Wagons must remove all rear decking and seat components. If you choose not to run a rear bumper on
a wagon, you may drop the tailgate straight down welded to the body only.m
