Extreme 4 /
Stock unless otherwise stated.
1. 1980 OR newer front wheel drive, 4 cylinder
passenger cars only. No all wheel drive or all wheel
steering allowed. No station wagons, vans or pick up
2. Body must maintain original dimensions, standard
as from the manufacturer. Original body material may
be patched / replaced with sheet metal as long as
original body lines remain.
3. Floor pan, trunk pan, front and rear interior
wheel wells must remain stock and in stock location.
4. Interior trim must be removed. (Carpet, head
liner, side panels, etc). Any material which is
flammable must be removed.
5. Hood must be
held shut with at least two hood pins.
6. Must add at
least 3 crash bars in front of driver. All glass
must be removed from car.
7. Fabricated dash board OK. Sheet metal interior
OK. Must have a minimum of two access holes for
8. Rear and
passenger must be removed and a minimum 20 gauge
sheet metal cover to form a rear fire wall installed
to seal rear area of inside of car from trunk area.
9. Doors must
remain in stock location. Sheet metal doors OK.
fenders/ wheel wells must remain stock and
unaltered. Must have full floor pan. May be patched
to repair rust or damage.
11. Must have
at least one hoop bar with three door bars on
drivers door. Must have seamless tubing 4 point role
cage with X braced hoop behind driver and a minimum
of three door bars with vertical bracing from top to
bottom. Where bars connect to frame must be a
minimum 1/4 inch steel plate welded to frame in a
secure and safe manner. Front and rear bars OK.
wing/spoiler OK on rear of car.
PERFORMANCE ENGINES. Stock 4 cylinder engine only.
Engine must remain stock as delivered by the factory
and must remain in stock location. No Cosworth or
rotary engines allowed, NO turbo charged or
supercharged engines allowed. ABSOLUTELY NO NITROUS.
All engines must be used in the model of car for
which they were manufactured. No factory or
aftermarket high performance components will be
allowed in the engine or drive train. Stock
carburetor or fuel injection system for the make and
model of car being competed only. Stock production
air filter element required. No high
performance will be allowed. (K&N OK) No cold air
system allowed. Cone type must be bolted to intake.
Only water allowed in radiator and cooling system.
No antifreeze allowed. May remove exhaust pipe and
mufflers. Exhaust manifold must remain stock with
pipe extending beyond the drivers seat, parallel to
the ground. Cast iron manifold
only. No headers of any kind. Only Up to 2.2 liter
engine allowed. No variable valve timing engines.
14. 2200 lb.
minimum weight. Weight break for safety devices head
and neck restraint - 25 lbs full containment seat.
15. Only stock
suspension parts allowed. Drilling or cutting of
the stock suspension parts for camber is OK. Safety
hubs OK. Car may be lowered with stock parts only.
No adjustable coil overs. Stock shock location only.
Cannot move where shock/strut mounts to car.
16. Must have
functional OEM front brakes. Rear brakes may be
removed. No bias adjusters or shut offs allowed.
17. All wheels
must be the same size and offset. 7 inch wide racing
wheels ok. Tires must have DOT stamp and legal for
highway use. No performance, trick, gumball, fancy
or exotic tires of any kind allowed. No less than
300 tread wear rating allowed. Track reserves the
right to disallow any tire from use in competition
in this class.
racing seat with minimum 5 point harness required.
Fire extinguisher with gauge, mounted in quick
release harness in reach of driver is mandatory.
Racing helmet with a sa2015 rating required. No
19. Anything to promote safety may be added with
approval from tech man.
20. If stock fuel tank is ahead of rear axle it may
be used or replaced with a fuel cell. If stock tank
is behind rear axle it must be replaced with fuel
cell enclosed in a steel can mounted securely in
center of trunk. In either case there must be a
metal firewall between fuel tank and drivers
21. After three wins driver must start his/her next
race from the rear. Only exception is big money race
or special event.
COMPUTER ONLY $150. Only top five eligible to buy
computer; Furthest car back gets first choice to buy.
23. MOTOR BUY
RULE $1,500. Only top five eligible to buy
motor; Furthest car back gets first choice to buy.
24. Three items only head, intake, bore and stroke.
Overhead camshafts and gears will be considered part
of the head. $300 with track retaining $100. Any car
refusing protest will forfeit all money and points
for the night. Tech man has final say. Must finish
directly behind the car in order to protest.
25. Visual protest $25 must be presented to the tech
man in writing 30 minutes before the main event.
26. Top three
cars will be visual inspected directly after the
main event each week. All cars may be subject to
random inspection at any time.