If you intend to autocross, deciding what class to run in matters a LOT.
Stock - allowed mods include brake pads (rotors already put you out if they're slotted) only, shocks only (no springs), catback exhaust only, air filter only (no intake changes AT ALL). You can change or modify the FRONT swaybar only. You can run any wheel that is stock size +/- 6mm of offset, so any 17x7 with offset between 48 and 36 mm. Any DOT rated tire including DOT slicks like Hoosier A/R6, BFG R1, Kumho V710, etc. You may run a racing harness that connects to stock bolts only. THAT IS IT.
STX - this is the "street tire" class that the IRL goes into. Most bolt-ons are allowed, as wel as a few other goodies - but you lose the slicks, as the tires have to e treadwear 140 or higher. Suspension is mostly open but must use stock mounting locations, no drilling or welding. Sway bars, springs or coilovers, etc, fine. Brakes are more or less open, you may change the rotors, pads, even the calipers. You may change the intake but not the TB or anything past it. You may run headers and a full exhaust as long as the cat is +/- 6" of the stock location. you may run a tune - but boost levels may not be changed in blown or turbocharged cars, so no pulley. you may run a different battery and the battery may be relocated (not an issue for us, lol). Wheels size is open, tire size is limited to 265 width for 2wd cars in STX.
SMF - "Street Mod, FWD" - this is where the bigger boys play. Basically, if it bolts on without welding or cutting, it's legal. Engine internals may be changed, heads ported, even motor swaps are legal (at this time, engine must be from the same manufacturer - and that means Saturn, not GM). CF hoods and such and any boost mods will land you in this class, period. Tires must be DOT stamped, DOT slicks are legal.
Based on what you say you have and want to do, I'd start building an STX car. You'll never hang with the big boys there (the non-STi WRX, RX-8, and BMW 330i reign supreme in this class for the most part) but you'll have a blast and the mods are straightforward. Get CSS/t shocks all around, Pedders or Progress springs, a rear swaybar, some Hawk HPS or HP+ pads, and some decent tires and get started.
Originally Posted by AlphaJaguar5
I try and get with as many dudes as possible when I'm out on the road.
Originally Posted by h4ckler
I miss the days when people weren't emo and just hung themselves instead of bitching on youtube....
RIP "Sally" - Pacific Blue 2005 Ion Redline Comp Pack
14.8 @ 96 mph, 2.3 second 60' - 100% stock on stock tires, 85 degrees out at 2200 ft altitude...
207 whp, 187 wtq, 100% stock uncorrected
numbers on a mustang dyno...