STREET STOCK 2012 Season
The 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 the condition of
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/OR REGULATIONS. They are intended as a guide for the conduct of
the sport and are in no way a guarantee against injury or death to a participant, spectator or official.
The race director shall be empowered to permit reasonable and appropriate deviation from any of the
specifications herein or impose any further restrictions that in his opinion do not alter the minimum
acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH
ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the
officials. Their decision is final.
No radios, EXCEPT MANDATORY RACECEIVERS, allowed in car, or with any pit member or anyone connected
with the racecar.
1. SAFETY EQUIPMENT
Rules apply at all times car is on track. An operational 2-½ pound minimum fire extinguisher with gauge
visible for inspection purpose is mandatory in each racecar and tow vehicles. Extinguisher must be mounted
in a quick release bracket. DUCT TAPE IS NOT AN ACCEPTABLE MOUNTING DEVICE.
Snell-rated SA2000, SA2005, SA2010 or SFI 31.1/2005 helmet required. Roll bar padding required in driver
compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves, shoes
and neck brace (or head and neck restraint) required. Right and left seat head supports required if using
head restraint system with no neck collar. Recommended: Fire retardant head sock and underwear; and
collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style,
and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two-inch with head
restraint system) wide SFI-approved five point safety belt assembly required (Y-type shoulder harness not
allowed), must be mounted securely to roll cage, recommended to be no more than one year old, maximum
of 3 years old. Any safety equipment physically or visibly wore or damaged must be replaced, regardless of
age. All Safety equipment must not be altered and must follow manufacturers use and requirements for
Any American OEM full body rear wheel drive passenger car, 1964 or newer, full frame or unibody. Minimum
107.5 inch wheelbase, maximum one inch difference from side to side. Frame must match body — GM to GM,
Ford to Ford, Chrysler to Chrysler — AND wheelbase to wheelbase. Exceptions are: 1980 or newer Ford two
door unibody may be installed on 1978-1987 GM full frame OR Ford full frame (shortened to minimum 107.5
inch wheelbase). Chrysler engine may be put in 1978-1987 GM full frame. Rear of frame behind rear tires, no
further forward than one inch behind factory seam, may be replaced in OEM location with minimum 2 inch
by 2 inch steel tubing with 0.095 inch wall thickness. Factory seam must remain visible. Unibody must tie rear
frame to front frame. Frame may be “X” braced. No Camaros, Firebirds or Mustangs.
3. ROLL CAGE
Main cage must consist of continuous hoops, minimum 1.5 inch O.D. seamless DOM tubing, with a minimum
wall thickness of 0.095, low carbon or mild steel recommended. Four-post roll cage required, front down bars
and rear hoop must be welded to OEM frame. Driver’s head must not protrude outside cage with helmet on.
Rear hoop must have “X” brace, consisting of one full horizontal and one full diagonal bar, minimum 1.25
inch O.D. with 0.083 inch wall thickness. Front down bars must be tied together; passenger side front down
bars may be maximum 11 inches in from top of door. Must be minimum 40 inches between outside edge of
front and rear down bars at top of door panel. Maximum 41 inches (48 inches for 1988-1996 GM bodies) from
top center of windshield to front edge of rear hoop. Maximum 13 inches (20 inches for 1988-1996 GM bodies)
to front edge of top halo. Top halo must be minimum 40 inches across, outside to outside. Rear hoop may be
maximum 12 inches in from bottom of opera window. Minimum one cross bar in top halo. May have
maximum two horizontal bars, (in addition to bar tying front frame horns together) for radiator protection;
must be behind bumper, within confines of body, no wider than stock frame horns. Required rear kickers
(down bars) and engine hoop must be minimum 1.25 inch OD tubing, with 0.083 inch wall thickness. Fuel cell
protection required must be mounted frame rail to frame rail, no higher than fuel cell, inside trunk area with
maximum 1.75 inch OD tubing. All bars must be inside body. Foot protection bar required.
4. DOOR BARS
All door bars and uprights must be minimum 1.50 inch O.D. with 0.095 inch wall thickness. Minimum three
door bars, both sides, parallel to ground, and perpendicular to driver. Minimum four uprights tied from frame
to top door bar on driver side, and minimum three uprights on passenger side. Steel door plates, 18 gauge or
0.049 inch minimum thickness, must be securely welded to outside of door bars on driver’s side. Plate must
cover area from top door bar to frame and from rear down post to five inches in front of seat. Must be visible
Unaltered OEM, and centered over wheel wells (front to rear and side to side). Body and engine make must
match. Front body mounts must be visible. May use 1988-1996 Cutlass, Grand Prix, Lumina, Regal or Monte
Carlobody on 1978-1987 GM 108 inch wheelbase full frame. Sunroofs and T-tops must be enclosed. OEM or
aftermarket plastic nose and tail pieces allowed (recommended to match body). All body panels may be
gutted, including fenders, doors, hood, roof, quarters and trunk, but must remain original size. No
overlapping or shortening of body panels. Roof Rake must remain similar to stock for make and model of
body. Hood must be separate from fenders, in OEM location, with rear sealed off from driver compartment
with metal. All inner wheel wells may be removed. Rear edge of trunk may be trimmed and rear tail light
support removed only if aftermarket tail piece is used. Trunk floor must be removed over rear end housing;
entire trunk floor may be removed. All windows must remain open, except opera windows may be covered
with clear lexan, no decals. All ‘B’ pillars may be trimmed to minimum 2 inch width, must remain within OEM
location. Maximum seven inch metal sun visor may be added to top of windshield opening. Wheel wells may
be trimmed for tire clearance. No spoilers, hood scoops or reflective body panels. Rocker skirt/flare allowed
between tires only, cannot extend outside tires, minimum 4 inch ground clearance.
6. DRIVER COMPARTMENT
Minimum of three windshield bars in front of driver. Aluminum high-back seat only, must be bolted in using
minimum 0.375 inch bolts and follow manufacturers installation and usage guidelines. Seat must remain
inside all confines of roll cage. Driver must be sealed off from track, driveline, engine and fuel cell. Kick and
rocker panels may be removed. Front OEM firewall may be replaced using steel fabricated firewall, 18 gauge
or minimum 0.049 inch thickness. Top of firewall can be no further back than 12 inches from the back of
engine block, measured horizontally. Bottom of firewall can be no further back than rear of oval body mount
frame hole. Dash must not extend more than 24 inches back from top of firewall. Dash must be flat, rear can
be no higher than front, except for cowl in front of driver. OEM floor pan may be replaced using steel
fabricated floor pan, 18 gauge or minimum 0.049 inch thickness, securely welded to frame. Floor pan may be
replaced from front firewall to rear halo supports. Must remain flat/OEM appearing from frame rail to frame
rail, can be no higher or lower than frame rail. Exception is maximum 8-inch tall drive shaft tunnel. Tunnel
must remain similar to OEM tunnel in size. No cockpits, interior must remain open. Rear firewall may be
aluminum or steel and may be located no further forward than rear halo supports and no higher than bottom
of rear opera windows. All holes in firewalls must be covered with metal. No driver-adjustable devices
allowed while car is in competition, no brake adjusters. No mirrors.
7. FRONT SUSPENSION
All components and mounts must be steel, unaltered OEM, in OEM location and match frame. Rubber, nylon
or steel lower A-frame bushings only - no offset or bearing type. No sway bars. Exceptions are: OEM upper
A-frame mount may be moved or replaced with aftermarket steel non-adjustable mount matching upper
A-frame bolt on design; OEM or OEM replacement ball joints allowed. OEM upper A-frame may be replaced
using steel non-adjustable aftermarket upper A-frame.
No rack and pinion. All components must be steel, unaltered OEM, in OEM location and match frame.
Exceptions are: bolt on spindle savers allowed, OEM steering column may be replaced with steel knuckles
and steel steering shafts (collapsible recommended). No Straight Steering Shafts Allowed (Must have
minimum ONE knuckle in shaft). Quick release required - steering quickener and steering wheel may be
One steel nonadjustable unaltered shock per wheel. No coil over, air, or remote reservoir shocks. No
Schrader or bladder type valve allowed. No coil over eliminators. One or all shocks may be claimed per
event for $50 each, counting as one claim on card, following shock claim procedures.
One steel spring per wheel only. All coil springs must be minimum 4.5 inches O.D. and non-progressive.
11. REAR SUSPENSION
All components and mounts must be steel, unaltered OEM, in OEM location, and match frame. No
independent rear suspension. Rubber, nylon or steel control arm bushings only, no offset or bearing type.
Welded single-hole shock mounts only. Exceptions are: coil springs may be moved, but center line of axle
tube can be no further forward than the front of spring, or no further back than rear of spring; shocks may be
moved, but must remain similar to stock style mounting and location; lower control arm mounts on rear end
may have multiple holes (maximum of five) for adjustment. Upper control arm mounts on rear end must be
level with each other.
12. REAR END
Any steel approved OEM passenger car or truck non-cambered rear end (housing and carrier) allowed. Safety
hubs (floater) allowed. No sway/panhard bars. All components must be steel, exceptions are: lowering
blocks, axle cap, and drive flange may be aluminum. No adjustable lowering blocks. One inch inspection
hole in housing required. Full steel spool, steel mini spool or welded rear end only. Steel axles only. No
quick change devices. One piece drive flange only. No torque-dividing differentials. No Gold Tracks. No
Lockers. No scalloped ring gears.
13. BUMPERS/RUB RAILS
Maximum one inch wide by two inch tall steel or lexan rub rails allowed - bolted flush to body. Front and
rear tow hooks mandatory. All front bumpers must be mounted minimum six inches from front frame horns.
Steel bumper mounts only. No sharp edges allowed on bumpers, rub rails or bolts. One of two bumper
options must be used and must be OEM height:
OEM: Bumpers not covered by plastic nose or tail piece must be complete, unaltered OEM, capped to fender
with steel, welded or bolted. No bars past outside edge of body other than rub rails.
Aftermarket: Fabricated tubular bumpers allowed, but must be covered by plastic nose or tail piece and bent
to fit with rounded ends. Main bumper bar must be minimum 1.5 inch O.D. (maximum two inch) with 0.083
inch (maximum 0.125 inch) wall thickness on front, and 1.75 inch O.D. with 0.120 inch wall thickness on rear.
The only racing type tire that is allowed is the American Racer P-245 Tire with MSPA stamp on sidewall. No
altering, chemical softening or conditioning of tires. Tires may not be ground or siped. Grooving is limited to
cleaning out factory groves only. No re-caps.
A competitor may run non aggressive tread Street Tires for 2 weeks. As long as tire is no larger in size and
no wider in tread width than American Racer P-245. After 2 weeks of competition the American Racer P-245
Tire with MSPA stamp will be required. (Unless posted otherwise)
Wheel spacer or offset wheel, or a combination of the two allowed, but combination cannot result in wheel
offset being wider than standard 2 inch offset wheel, for each wheel. Rule is intended to prevent widening of
tire track / stance. Example: if using 3 inch offset wheel, a maximum 1 inch wheel spacer would be allowed,
which would result in same overall offset as a 2 inch offset wheel.
Maximum 8 inch wide wheel. Racing wheels and racing / safety 1 inch lug nuts required on all wheels. May
use bead lock, on right rear only. If using bead lock, right rear must measure 17 psi after each race. External,
steel bead lock only and it cannot make wheel any narrower than 8 inches and no wider than 8.75 inches.
Steel bolts only. Foam type or plastic outer mud cover allowed on right side wheels. Inner mud cover
allowed on left rear only. No bleeder valves.
Steel, unaltered OEM, or unaltered OEM replacement, operative four wheel, drum or disc brakes allowed.
Front components must match frame and maintain minimum OEM dimensions for hubs/rotors and calipers,
cannot be lightened. OEM diameter caliper pistons only. Bolt pattern may be changed. Larger studs allowed.
Vented rotors only, no scalloped or ceramic coated rotors. Rear rotors may be aftermarket 0.810 inch thick
(new). No floating brakes. No brake shut-off or pressure sensitive devices. No left to right proportioning
allowed. One front to rear proportioning device allowed. Brake bias adjustment cannot be made from
driver’s compartment or while in competition. Brake lines must be visible. Aftermarket pedal assembly
May run stock exhaust manifolds or round tube headers only. All primary header tubes must enter directly
into one collector at same point at end of header. Must remain dual exhaust, no crossover or “Y” pipes. No
exhaust through body panels or fenders. No merge collectors. No exhaust sensors. Must point away from
track and driver and exit behind driver compartment. Holes in exhaust pipe will not be allowed, no drilling of
pipe and connections must be tight and leak free. The last 24” of each exhaust pipe must be constructed of
maximum 2” outside diameter exhaust pipe. Additional muffler optional but not required.
17. FUEL SYSTEM
Mechanical OEM type push rod fuel pumps only. Racing fuel cell required, must be in minimum 20 gauge
steel container. Must be securely fastened in trunk above top of rear frame rails, behind rear tires, no further
forward than factory seam where rear frame rail can be replaced, with minimum two solid steel straps
around entire cell, two inches wide and 0.125 inch thick. No fuel cells allowed over rear end housing. Metal
firewall must be between driver and fuel cell. All cell mounts must be steel, securely welded to frame/cage.
No adjustable fuel cell mounts. Fuel cell vents, including cap vent, must have check valves. If fuel cell does
not have aircraft style positive seal filler neck/cap system - a flapper, spring or ball type filler rollover valve is
required. Fuel cell cap must be secured to fuel cell by cable, chain, or tie strap. Fuel lines through driver
compartment must run through metal pipe or metal conduit. One fuel filter only, cannot be in driver’s
compartment. No cool cans. Air cleaner top/stud cannot direct air into carburetor. No top flow air cleaner
housings, cold air boxes or air cleaner duct work.
MUST HAVE ROLLOVER VALVE IN VENT TUBE OF FUEL CELL.
Stock 2 barrel carburetor allowed, must match make and manufacturer of car. Example : Ford-to-Ford,
Chevy-to-Chevy, Mopar-to-Mopar. Holly #4412--2 bbl (500 not 750) carburetor will be allowed. Absolutely no
alterations or modifications to any carburetor, except for removal of choke plate. Choke horn cannot be
removed. Any driver caught with non-4412 - 500 CFM Holley or non-stock 2 barrel carburetor, will be fined
$500 or suspended for two weeks. Air bleeds cannot be removed. Float bowl must face forward. No
transverse mount carburetors. Carburetor adapter/spacer allowed, maximum thickness (between carburetor
and intake) including gaskets is 1.20 inches.
Top 10 may have to pull carburetor after every feature. Inspection Gauges will be used.
Carburetor may be claimed, following same procedure as engine claim. Driver claiming carburetor may not
claim engine or shocks on same night. Claim rule: Carburetor can be claimed for $125 ($100 to driver and $25
to point fund). Engine claim provisions will prevail. Carburetor is not included with engine claim.
Gasoline Only. Racing fuel is allowed. No alcohol, no methanol, no E85 / E98. No performance enhancing or
scented additives. Fuel must pass both dielectric and chemical tests.
One 12 volt battery only, must be securely mounted between frame rails, and positive terminal must be
covered.Batterymust be in Marine type case if mounted in driver compartment. Starter must bolt in OEM
location. Car must have capability of starting without being pushed or pulled. Car must leave initial staging
area on demand, unaided, or go to rear of that race.
A clearly labeled Battery ON/OFF ‘KILL’ switch must be to the right of the driver and within drivers reach.
This is for the Safety Crew to be able to kill power to everything.
No unapproved cameras, transmitting or listening devices. No timing retard controls, or digital gauges
(including tach). No electronic monitoring computer devices capable of storing or transmitting information
except analog tach. No adjustable ignition control boxes. Only one OEM 12 volt ignition system allowed,
must be out of driver’s reach. No additional ignition accessories. No magnetos or crank triggers. No MSD,
Accel or Crane (Aftermarket) ignition boxes allowed. OEM type alternator with internal regulator allowed. No
electronic traction control devices.
22. TRANSMISSION/DRIVE SHAFT
Must have at least two forward gears and one reverse, plus neutral position. With motor running and car in
still position, must be able to engage car in gear and move forward, then backward. Only OEM production
type transmissions allowed - two speed, three speed, four speed and automatic. No five speed (or more)
transmissions, no “in and out” boxes, no Bert / Brinn style transmissions or quick change devices allowed.
Functioning shift levers must be in OEM location. Flywheel / flexplate must be bolted directly to end of
crankshaft, and pressure plate must be bolted directly to flywheel / flexplate. One flywheel / flexplate only,
and all driveline components within bellhousing must rotate consistent with engine RPM while car is in any
gear. Unaltered flexplate must be full OEM, or OEM replacement.
Manual: Must be OEM or OEM replacement case and have a working 7.25 inch minimum diameter, steel
and/or aluminum, single or multi-disc clutch inside explosion-proof steel bellhousing - minimum 270 degrees
around top of clutch/flywheel area.
2013 - No Multi-Disc Clutches, Single-Disc Clutches Only
Automatic: Must remain in OEM or OEM replacement case, with a functioning OEM appearing pump.
Aluminum OEM bellhousing may be replaced with aftermarket explosion-proof aluminum bellhousing.
Original OEM bellhousing must have approved scattershield constructed of minimum 0.125 inch by three inch
steel, 270 degrees around flexplate. Manual bump starts allowed.
Drive Shaft: Minimum two inch diameter magnetic steel drive shaft must be painted white. Magnetic steel
slip-yokes only. 360-degree drive shaft loop required and must be constructed of at least 0.25 inch by 2 inch
steel, or 1 inch tubing, mounted 6 inches back from front U-joint.
23. ENGINE COMPARTMENT
The forward most spark plug hole may not be set back any further than a perpendicular line with the center
of the upper ball joint for each manufacturer. Aftermarket engine mounts allowed, including mid-plate.
Engine must be OEM appearing, must be able to be used in conventional passenger car without alteration.
GM with GM, Ford with Ford, Chrysler with Chrysler. Radiator must be mounted in front of engine. Cooling
system may be modified. No antifreeze allowed, water only. Overflow tubes must be directed into overflow
tank (one gallon size recommended).
24. ENGINE SPECIFICATIONS
Any American make engine allowed. Steel heads, block and oil pan only. OEM passenger vehicle production
block only. No GM Bowtie, Ford SVO or Chrysler W blocks. Castings and fittings cannot be changed, no
machine work on outside of engine. No cubic inch limit. Full roller rocker arms allowed. Must have 1 inch
inspection hole in intake to view camshaft and lifters. No stud girdles. Flat tappet cam/lifters only, cannot
alter lifter bores. No mushroom lifters. No roller cams. OEM firing order cannot be changed (GM:
1-8-4-3-6-5-7-2). Steel or aluminum water pumps allowed. No electric water pumps allowed. ‘Wet’ sump oiling
system only. Accumulator allowed – cannot be located between seat and door bars.
Must have 1 inch minimum inspection hole in intake to view camshaft and lifters.
Unaltered, aluminum or cast iron, low rise, two- or four-barrel intake. No porting or polishing allowed to any
intake. Rise of stock intake above engine block can be a maximum of 4.00 Inches. To figure intake rise
height, add “A” + “B” and divide by 2. Example A is 3.7”, B is 4.1”. (3.7+4.1) / 2 = Intake Rise Height of 3.9”
Cooling lines allowed on aluminum intakes. Disqualification, loss of points, purse and $250 fine if any
alterations are found to intake. No marine, bow tie or high rise intakes.
26. ENGINE CLAIMING RULES:
$400 cash claim on engines. $50 goes to the point fund and $350 goes to the driver being claimed.
CLAIM DOES NOT INCLUDE:
-Carburetor with Spacer -Bell-housing
-Starter -Sending units and switches
-Clutch ball or arm -Water pump
-Distributor, Distributor Cap and Plug Wires -Water restrictor and water outlet
-Clutch and pressure plate -Exhaust manifolds or headers
-Motor Mounts -Fan and pulleys
-Throw Out Bearing -Fuel Pump
First four (4) position finishers in the feature event must report directly to the claim area and are subject to
engine claim by any driver finishing fifth (5th) on back. Any driver lapped by the fourth (4th) place car is not
eligible to claim. Drivers are allowed to claim only one engine per event, regardless of the outcome of that
claim. In case of multiple claims on the same engine, engine will go to the claiming driver’s number pulled
from a drawing.
Drivers making the claim must drive his/her car immediately after the finish of the feature, (under its own
power) directly to the claiming area. Only drivers and officials are allowed in the claiming area. Claims must
be made within five (5) minutes of the end of the feature and claimed engines must be completely removed
within one (1) hour from the time the claim is made and driver agrees to sell the claimed engine. First sell or
no sell by driver being claimed is binding. Promoter may claim any engine following the feature; so long as
claim is made within the five (5) minutes of allotted time.
REFUSAL to sell will forfeit all cash and contingency winnings for feature, any trophy earned in feature, and
ALL SEASON POINTS, driver will also be suspended for two weeks and may not race in the Street Stock class
again. Any driver found to be claiming an engine for anyone else other than himself/herself will lose all
points for the season and will be suspended for 30 calendar days. All claimed engines must be removed from
car at track; buyer must examine engine before removal. Once removal has started, sale is final.
NOTE: Driver may claim engine and carburetor from same car in one night.
NOTE: Driver may only make one claim per season. Unless that driver has had 2 claims made against them,
after they have made their claim. Then that driver may make one additional claim.
NOTE: Claiming driver must have raced the two weeks prior to claiming.
NOTE: Your race car must be legal to make engine claim.
** Claiming driver must run claimed engine the next 2 times the driver/ car is at the same track where the
engine was claimed. Even if it takes 2 weeks, 2 years, etc. to fulfill the 2 time requirement or may not
compete in the Street Stock class again and may result in loss of points for the season. **
Minimum weight limit is 3,000 pounds, after race with driver in car. No cement pellet or liquid style weights.
No tolerance. No weights and/or loose objects in driver compartment or outside body and must not be visible.
Weights must be securely mounted to frame or roll cage and painted white with car number on it. Weights
must be attached with at least two 0.5 inch bolts. Cannot have more than 25 pounds of ballast weight per 0.5
inch bolt. Example: 75 pound stack of weights requires three (3) 0.5 inch bolts. No titanium, magnesium or
carbon fiber products. No gun-drilled, tubular, hollow bolts or studs. Must use magnetic steel fasteners only.
28. WRECKER HOOKS MANDATORY FRONT AND REAR
Both must be accessible. If no wrecker hooks are on the car, the car will be pushed, towed, or dragged to the
infield until after the racing program is completed.
NEITHER WRECKER CREWS NOR RACETRACK PERSONNEL WILL BE RESPONSIBLE FOR ANY DAMAGE DONE
TO THE ANY VEHICLE.
NOTE: Non-Conforming or altered parts may be confiscated
No reflective car numbers. If we can’t see them from 100 feet away at 80 MPH, you may not be scored.