Here you can find out where and how your cars is classified for autocrossing. We are using the current SCCA standards to make things easy. If your car is stock, please click here if it is not stock, but only has mild mods, the odds are that you will be in STS. Please review either the Street Prepared list to see if it is listed there, or scan the general rules below to see if you fit elsewhere!

If you have any questions on this please contact either Scott Napier or Anne Osantowski for clarification.

 
 

Stock

As a rough guide, if your car has modifications beyond this list it is not eligible for Stock Category:
  • Anything available on the exact model and year of your car as standard or optional equipment, as installed on the factory assembly line (nothing available only dealer-installed is allowed), plus
  • Standard OEM identical replacement parts
  • Accessories, gauges, appearance, comfort, and convenience items (not replacement driver's seat, though) that basically don't help
  • Added roll bar or roll cage to spec (not required, though)
  • Driver harness (no cutting seats to install, though)
  • Trailer hitch and/or tow bar mountings
  • Any wheel of diameter and width identical to a stock or factory optional wheel, offset within +- 0.25 inch
  • Most street legal tires that will fit the mounted wheels and stock bodywork
  • Any shock absorber of the same type and mounting as original; no change to standard spring mountings is allowed; suspension geometry may not be altered; gas or hydraulic shocks are permitted
  • Any brake linings; pre-1992 cars may use solid/braided metal brake lines.
  • Any front anti-roll bar (no change to stock/optional rear anti-roll bar, if present)
  • Manufacturer specified ignition settings only
  • Any replacement air filter element (or removal of air filter element); no plumbing changes, however
  • Engine bored no more than .020"; no balancing or porting/polishing of head
  • Replacement of any part of the exhaust system past the catalytic converter (if quiet)
  • Any oil filter
  • Added clutch scattershield

Street Touring - S

If your car is a normally aspirated sedan (four seats, four factory seatbelts, not sports-car derived) of 3.1 Liters or less, or one of a few small turbocharged cars specified in the rules, and perhaps prepared further than allowed in Stock Category, it may be eligible for one of the Street Touring Classes. Street Touring allows anything allowed in Stock, plus (roughly) these modifications:
  • Any shocks, struts, and springs, using original attachment points
  • Any sway bars
  • Any wheels up to 7.5" in width that fit over stock brakes
  • Tires up to and including a width of 225, with a treadwear rating of 140 or greater.
  • Strut bars/braces as allowed in Street Prepared.
  • Exhaust system downstream of catalytic converter(s)
  • Short throw shift kits
  • Spoilers, body kits, rear wings, etc.
  • Pedal kits and other interior cosmetic accessories
  • Alternate brakes pads and linings
  • Any fully padded and upholstered front seats with reclining seat backs
  • Removal of factory trim (rub strips, emblems)
  • Alternate steering wheels of any diameter, otherwise meeting Stock rules
  • Cross drilled and/or slotted brake rotors
  • Alternate air cleaner enclosures
  • No limited slip differentials except factory viscous coupler type units
  • Stock brake calipers/drums
  • Fenders may not be cut or flared (but specific modifications for tires OK)
  • Emission-legal headers
  • Emission legal modifications to Engine management system, either electronic or mechanical, but not both.
  • Engine and transmission must remain unmodified, including emissions equipment

Street Touring - 2

Same limitations as Street Touring - S, but generally allows 2-seater sports cars cars and 2 + 2 sports-car derivatives.

Street Touring - X

Same limitations as Street Touring - S, but generally allows cars up to 5 liters or 2 liters turbo- or supercharged, with Limited Slip Differential, and certain other extensions.

Street Touring - U

Same limitations as Street Touring - X, but generally allows cars of unlimited displacement , or up to 3.1 liters turbo- or supercharged, with unrestricted wheel width, tire width up to 275 (RWD) or 245 (AWD),

Street Modified

Street Modified is a pretty free-for-all class that is a full National class since 2002.  For streetable sedans, expands eligible vehicles and modifications above Street Touring, above Steet Prepared, and perhaps even above Prepared category.
  • All Street Prepared modifications are allowed, plus
  • Unrestricted modification of engine, drive train, and suspension, and some other modifications, as long as the car uses highway fuels.
  
   A minimum of 40 entrants is required to hold the event, and it will be capped at a total of 80.