Extreme 4 /
Rules and/or regulations set forth herein are
designed to provide for the orderly conduct of
racing events and to establish minimum acceptable
requirements for such events. These rules shall
govern all events, and by participating in these
events, all participants are deemed to have complied
with these rules. NO EXPRESSED OR IMPLIED WARRANTY
OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR
COMPLIANCE WITH THESE RULES and REGULATIONS. They
are a guide and are in no way a guarantee against
injury or death to a participant, spectator, or
official. Cherokee Speedway retains the right to
make all decisions and reserves the right to make
any rule changes/amendments with dispute or appeal.
ALL VEHICLES MUST BE STOCK AND UNALTERED AS
DELIVERED FROM FACTORY 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 vans or pickup trucks.
2. Body must maintain original dimensions, standard
as from the manufacturer. Sheet metal bodies may be
used but must remain stock appearing and maintain
stock body lines. Aftermarket nose and tail may be
used but must maintain original dimensions within
reason. Horizontal trunk lid surface must be
covered, rear may be open. Aftermarket wing/spoiler
OK on rear of car.
3. Front fire wall must have all holes covered with
sheet metal or aluminum material. Fabricated dash
and interior boxing OK, must be sheet metal or
aluminum ONLY, and must have two access holes for
inspection purposes. Floor pan, front and rear
interior wheel wells must remain stock. If stock
fuel tank is used, trunk pan must be in place. If
stock fuel tank is behind the rear axle, it must be
replaced with a fuel cell enclosed in a steel can,
be mounted securely in center of trunk, and have a
fabricated rear firewall made out of sheet metal or
4. All glass and interior trim must be removed. All
flammable material must be removed.
5. Fuel Rule - Pump Gas Only. No E-85. Only
petroleum-based unleaded or leaded gasoline as
defined by the American Society of Testing and
Materials is permitted. The only oxygenates
permitted are MTBE and ethanol alcohol in the same
levels as that are found in pump gasoline.
6. All vehicles must have seamless tubing 4-point
roll 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 but
cannot protrude beyond bodywork. Main components of
4-point cage and driver's door bars must be at
minimum 1.5”x.095” tubing. Must add 3 crash bars in
front of driver.
1. NO PERFORMANCE ENGINES. Stock 4-cylinder engine
only. Maximum displacement of 2.2 Liters. No
variable valve timing engines or variable valve
timing engine components. Engine must remain stock
as delivered by the factory and must remain in stock
location. No Cosworth or rotary engines. No
turbocharged or supercharged engines. ABSOLUTELY NO
NITROUS. All engines must be for the make/brand of
car for which they were manufactured. All internal
and external parts must be for engine being claimed.
No engine components can be lightened, altered, or
modified in any way. ARP rod bolts, head studs,
reusable gaskets o.k. but must be stock thickness.
No performance gaskets or spacers. No
high-performance components or aftermarket will be
allowed in the engine or drive train. Must utilize
all stock fuel injection or carburetor components
for the engine in vehicle. Factory air box and
piping with factory type filter (washable okay) or
cone type air filter attached to corrugated piping
inside of engine compartment may be used (No slick
wall piping). Outer diameter of piping must not
exceed outer diameter of stock intake pipe. Cone
filter may be attached directly to throttle body
(K&N ok). Exhaust manifold must remain stock with
pipe extending beyond the driver’s seat, parallel to
the ground. Headers allowed only as delivered from
factory for make/brand of car. All flywheels must be
stock as delivered from factory. Saturns with 1.9L
engine may lighten factory flywheel to 13lbs.
1. Up to 1.9L 2100lbs
2. 0L and up 2200lbs
2. Any vehicle that uses an engine other than that
delivered from factory must add 50lbs.
3. 25-pound weight break for each of the following;
certified head and neck restraint, full containment
seat, and/or certified fire suppression system with
a minimum of 3 nozzles (one in engine bay, one in
driver’s compartment, one at fuel cell/fuel tank).
1. All transmissions must have all working gears
including reverse. No lightening, altering or
removal of gears or transmission components. Open
differentials may be welded.
1. Only stock suspension parts allowed. Drilling or
cutting of the stock suspension parts for camber is
OK but must be performed in a manner deemed safe by
tech officials. Safety hubs OK. Car may be lowered
with stock parts only. No performance or aftermarket
shocks/struts, O.E. replacement or equivalent only.
No adjustable coil overs. Stock shock location only.
Cannot move where shock/strut mounts to car.
1. Must have functional OEM front brakes. Rear
brakes may be removed. No bias adjusters or shut
Wheels and Tires
1. Racing wheels allowed. All wheels must be the
same size and offset. 7-inch wide max. Outward
facing beadlock optional on the right front only.
2. Tires must have DOT stamp and legal for highway
use No performance, trick, gumball, fancy or exotic
tires of any kind allowed. Track reserves the right
to disallow any tire from use in competition in this
1. SFI or FIA approved racing seat with minimum
5-point harness required. Harnesses must be SFI or
FIA certified and must be in date. Fire extinguisher
with gauge, mounted in quick release harness in
reach of driver is mandatory. Racing helmet with
SA2015 rating required. No motorcycle helmets.
2. Anything to promote safety may be added with
approval from tech man.
1. ENGINE COMPUTER ONLY $150. Only top five eligible
to buy computer, furthest car back gets first choice
2. ENGINE BUY RULE $1,000. (no bolt own's included)
Only the car behind can buy.
3. TRANSMISSION BUY RULE $500. Only the car behind
4. CAMSHAFT BUY RULE $100 PER CAM. Only the car
behind can buy.
*Any item tech man deems altered will be
disqualified if not covered in rules.
1. Intake, exhaust, throttle body and remove valve
cover for visual inspection. $150 $50 acceptance
fee. Track retains $50
2. Complete engine protest. $500. $200 acceptance
fee. Track retains $200.
3. Fuel protest is $125 and $125 acceptance. Blue
Ridge Labs will conduct laboratory analysis of
4. Visual protest $25 must be presented to the tech
man in writing 30 minutes before the main event.
5. Top five cars will be visually inspected directly
after the main event each week. All cars may be
subject to random inspection at any time.
6. Looking for small or unimportant errors or faults
will not be tolerated or allowed. We are aware that
this rulebook may not cover every situation or
issue. Officials have final say on ALL protested or
claimed item issues.
ALL RULES SUBJECT TO CHANGE OR CLARIFICATION A
MINIMUM OF 2 WEEKS BEFORE NEXT EVENT AT THE
DISCRETION OF THE TECH MAN. TECH MAN HAS FINAL SAY.