2013 Street Stock Rules

Any 1955 to present RWD, except 1982 & newer Camaro & Firebirds. Chassis must be stock dimensions
for year, make, & model. All chassis must remain stock for year, make & model, unless otherwise noted. (Minimum wheelbase of 107 inches). Stock mounting points must be utilized, no altering, cutting, or moving of any suspension mounting points.  Rear frame rails from center line of rear axle to rear of frame (bumper mounts) may be replaced with 2x3 square tubing .095 minimum wall thickness. Unibody cars must have stock front and rear frame sections
tied together with 2x3 or 2x4 square tubing .095 minimum wall thicknesses. No tubular chassis. Refer to
Unibody diagram.

ROLL BARS & BRACING
Roll bars must be a complete 6 pt. bar with 4 inside of driver’s door. Bar must be minimum 1 1/2 O.D.
black steel pipe or seamless tubing of .095 thickness. All junctions must be gusseted, also must have 1
down bar center of windshield opening of the same dimensions. No offset or set back of the roll cage.

SEAT
Aluminum racing seat is mandatory. Must have a high back, minimum of .095 materials, 5 pt. harness &
window net mandatory.

FRONT SUSPENSION

A. Upper Control Arms: May use stock unaltered OEM A frames or replacement steel cross shaft aftermarket a-arm NO longer than 9 inches measured from center of cross shaft to center of ball joint. Aftermarket upper A frame mounts allowed in OEM location with a max. 1 inch tolerance. Control arm length of 9 inches MAX. Strut cars can run auxiliary shocks but must disable dampening of original strut shock by drilling and draining fluid.

C. Spindles: Stock OEM for make, model, and year of chassis being used. No pinto, Vega or after
     market spindles. You must use OEM wheel bearings. Spindle savers are allowed.

You may use polyurethane or steel replacement bushings. NO mono balls or Heim joints, NO offset bushings, NO composite or mono leaf springs. No leaf spring sliders, leaf spring cars are allowed one weight jacking device per wheel. Coil cars are allowed adjustable spring cups or jacking bolts, no three links or torque link suspensions.( May use radius rod ends only where noted any questions see tech official)

·                       Springs: Upper set of spring must mount in stock position in factory cross member. No moving of
factory cross member. Lower set of springs must be mounted on top plain of rear end housing.
May use aftermarket weld on mounts. Spring may be of any length but with a minimum of 5 inches
in diameter. May use adjustable spring cups or jacking bolt.

·                       Shocks: Must be mounted in stock location for the type of rear end housing being used. Lower
mount of shock must be mounted in stock location. Upper mount of shock may use an aftermarket
or fabricated mount. May use fixed bearing shocks. No shocks with a Schrader valve or remote
reservoir. NO coliovers. 

ENGINE
1955 to present engine may be run. Must be in model line (i.e. Chevy/Chevy Ford/Ford and so forth)
Engine must be in stock location. Minimal frame notch allowed for fuel pump clearance. All blocks &
engine components (head, intake etc.) casting numbers must remain. Cubic inch limit: Chevy 350, Ford
351 & Mopar 360 must have stock stroke & bore plus.060 oversize bore. Flat top pistons only, no domes
or pop up. Stock unaltered cast iron 2 barrel intake or option intake Edelbrock Performer 2101 and Vortec
2116 allowed. Hydraulic or solid cams only, no roller or hydraulic rollers allowed. 1.5 ratio aluminum
rocker arms allowed. No 1.6 or staggering rocker arms must be stock firing order. No 4-7 swaps. Stock
cast iron OEM Production heads or Stock Vortec part numbers, 10239906, 12552520, 12558062 allowed.
World Products unaltered part numbers 043600 and 043610 also allowed. No OTHER aftermarket or high
performance heads permitted. Must have stock casting identification numbers. No porting, polishing, or
grinding of any kind. No angle plug heads are allowed. No valves larger than 2.02. No valves larger than
1.94 & 1.50 in Vortec heads.

CARBURATOR
Stock Holley 4412 only. 1 inch carb. spacer allowed plus 2 gaskets total with 1 3/16 max. Carburetor must
pass DH2 gauges. NO alcohol or fuel additives allowed. Gas pedals must have toe lift. No cable linkage
allowed. 2 RETURN SPRINGS MANDATORY ON CARB!

EXHAUST
Headers: May use chassis or lay back style crossovers. Max 1 5/8 tube, 3 ½ collector. No 180, tri-y
headers. Mufflers are recommended. Exhaust must be leak free & fastened securely. Exhaust must exit
behind driver.

IGNITION SYSTEM
12 volt OEM ignitions only, stock type distributor. No ignition altering devices, no high performance
ignitions allowed. (Accel, MSD, Moroso, DUI etc.)

Note: Engine rules are directed at the Chevy engine. Please check with Track Officials if another brand
engine is being considered for competition.

FUEL SYSTEM
Fuel cell must be incased in a steel container. All fuel cells must have a tip over valve in fuel cell or vent
line. Maximum 22 gal. Fuel shut off mandatory painted a bright color marked on/off in plain view of Track
Official. No plastic or glass fuel filters.
 

COOLING SYSTEM
Radiator OEM style or aluminum must be in stock location. Must have one quart overflow tank. 22 pound
radiator cap and fan shroud are recommended. If u should remove hood & don’t have a shroud you will
not be able to enter track.

BATTERY
All cars must be self starting with a 12 volt system only (No high voltage batteries). Battery location is
optional. But must be mounted in a safe location and mounted securely. Terminals must be insulated.
Master disconnect switch mandatory, painted a bright color marked on/off in plain view of Track Official.

TRANSMISSION
Stock automatic or manual transmission only with all working gears (including reverse). Automatic
transmissions must have a functional torque converter with no internal modifications. No trick converters
or any method of creating direct drive. Manual transmissions can only be three or four speeds. Steel bell
housing mandatory. Stock clutch, pressure plate & flywheel. No aluminum clutch parts what so ever in
clutch system. No aftermarket transmissions.

REAR END
Stock rear end only. Rear end from different year cars will be allowed but must remain same as
manufacture. Rears must be locked. No aluminum parts, no limited slip, posi trac, or locker of any kind.
Driveshaft must be steel and painted white. All cars must have a full steel drive shaft safety hoop mounted
no more than 6 inches from front u-joint (No chain or cable).
Optional rear end, Nine inch ford rear:

BRAKES
Operable and effective 4 wheel brakes mandatory at all times. Shut offs allowed, but all components must
be in place (rotor, caliper, hose, etc). Dual brake master cylinders allowed. Bias adjuster allowed,
REMOTE ADJUSTERS ALLOWED. Rear stock disc brakes allowed. No aluminum brake parts.

WHEELS
Maximum 8” wheel width. All four wheels must be steel & any offset. Stock wheels must be reinforced.
Racing wheels recommended, and 1 inch lug nuts mandatory. Bead locks allowed on right rear only.

TIRES
American Racer 245/70/15 only. No options. No recaps. No softening of tires. Grooving, buffing, and
siping allowed.

BODY
Windshield openings must be covered with ½ square wire screen heavy gauge. Floorboards must be
complete with all holes patched from front firewall to rear firewall, from outside edge to outside edge of
frame rail. Passenger side floor can be removed, must be replaced by either 20 gauge steel or .080
aluminum plate, from center of hump to passenger side top door bar (must be no higher than straight
sloped – No LATE MODEL STYLE COCKPIT. Front firewall must be in stock location). (can be replaced
with 20 gauge steel or .080 aluminum plate) and rear firewall and rear window shelf must be sealed must
be sealed off from driver’s compartment with at least 20-gauge steel, no holes. All doors must be welded
or bolted shut. No solid dark painted bodies will be allowed. All cars must look presentable. Aluminum
bodies will be allowed as an option. Considering the fact that teams may attempt to fabricate their own
bodies, the following rules are to be followed:

Body
Any car not resembling the original body design will not be allowed to co0mpete.
No shoebox bodies, and DH2 Tech team may dismiss any car from completion for not maintaining body
requirements. NOTE: Rules apply to exterior body panels only.

Roof
OEM street or aftermarket fiberglass replicas only. No homemade steel, aluminum, or fiberglass roofs.
Fiberglass roofs must be of short track body dimensions and style. No late model, modified, or IMCA roofs.

Hood
Aluminum (.040 or .050) or steel must cover complete engine compartment. Hood scoops allowed,
maximum 3 inches tall and 21 inches in width. Hood scoops must be closed off with no external openings.

Nose piece
May be OEM or aftermarket replica. You must have a nose piece. Must fit correctly, with no late model
type flairs.

Fenders
May be constructed out of .040 or .050 aluminum, (.050 recommended). Fenders must resemble OEM
fenders. No late model flares and fenders must cover 90% of tire.

Doors
May be constructed out of .040 or .050 aluminum, (.050 recommended). Doors must resemble OEM
doors.

Quarter panels
May be constructed out of .040 or .050 aluminum, (.050 recommended). Panels must match OEM original
dimensions (within reason). Edges must be rolled or broke for strength and forms. Must carry some sort
of body lines with fenders and quarter panels in the middle of the body. Not flat panels.

Upper quarter panels
May be constructed out of .040 or .050 aluminum, (.050 recommended). Panels must match OEM original
dimensions (within reason). No solid panels and they must have quarter panel window cut in.

Trunk lid
May be constructed out of .040 or .050 aluminum, (.050 recommended). Must cover complete rear section
of the car and be removable for inspection.

Rear panel
May be constructed out of .040 or .050 aluminum, (.050 recommended). Panel must extend quarter panel
to quarter panel. Panel must be a minimum of 12 inches wide. No screen or mesh allowed. Must be
solid. Aftermarket tail piece recommended.

Spoiler
May be aluminum or lexan. Maximum height is 5 inches. Spoiler side boards may not exceed 5 inches in
height or 6 inches in length and must not extend beyond the main spoiler. Must be tapered from tallest
point to lowest point equal on both sides. Spoiler must be non-adjustable.

BUMPERS AND NERFS
Nerf bars/rub rails: You are only allowed to have one external horizontal rub rail on each side of the car
between the wheels. Must be steel tubing with a maximum dimension of 1” wide by 2” high. Rails must
mount flush against the body panels with each end cut at 45 degrees and capped with no sharp edges;
any exposed bolt must be a carriage type head.
Front Bumper: Stock type bumpers & covers only, no exposed tubular or 2x4 except for hoop.
Rear Bumper: Stock type, stock type cover, or fabricated steel, max. 4” height, cannot exceed 4” beyond
rear of body and filler. All rear bumpers must have lower quarter panel nerf (considered as part of
bumper), lower quarter nerfs must be against body and extend a minimum of 1 foot forward before turning
and mandatory connecting to frame. All bumpers cannot exceed being flush with sides. All collapsible
bumpers must be welded so they will not pull apart. Bumpers must be securely fastened to the frame. No
visible reinforcement on bumpers or cowcatchers. Front and rear bumper hoops no higher than 8 inches,
no wider than the frame. Bracing allowed – two braces per hoop, no larger than 1 ½”. May be welded to
frame behind bumper.

WEIGHTS & BALLAST
After race class weight (without adding fuel) 3000 lbs.
After race Crate motor (without adding fuel) 2750 lbs.
Cars using jacking bolts must weigh 3250 Lbs after race. (without adding fuel)
Any added weight or ballast must be mounted safely & painted white with car number painted on it.
ALL lost weights become property of the track.

Race Track Officials reserve the right to reject any entrant for any reason they deem necessary and
applicable. All participants are conduct themselves in a manner that reflects favorably on the sport of auto
racing. Foul or abusive language will not be tolerated. The management reserves the right to change any
rule or rules they feel it is necessary and refuse any protest if they feel it is unnecessary and being used
for harassing reasons. All fines and/or suspension will be in effect at all events. The interpretations and
invoking of the rules published herein shall be determined by Officials only in their professional discretion.

UNIBODY
The diagram shown is what needs to be stock EXCEPT where noted. These are the measurements:
Front frame is measured from center hole of front engine crossmember 32 inches back or from lower A-
frame mount 20 inches back. Must have stock rear frame rails & use stock mounting points.