1. 235/45/17 or 245/45/17 RE71RS, if stock offset, I think you need some spacer for the 245. The more common setup is stock offset (48mm) RPF1 and 7mm spacers. As mentioned, you'll need longer wheel studs to run a spacer that thick.
2. Upper OEM crash bolts from the dealer (like $12), these get your camber to roughly -1.1° to -1.2° per side. Subaru - 901000394, Toyota - SU00302818
3. Larger front sway bar - Perrin 19mm or Karcepts 0.804" bar, everything else is too big/stiff.
4. Koni Yellows - these add an additional 0.5° to 0.6° camber, usually end up around -1.7° per side.
5. Koni front centering washers (free, need to email Koni -
info@koni-na.com)
6. Stiffer bumpstops, RE-Suspension COT Series, 22mm internal diameter, trimmed to stock length or shorter. Med-White all the way around is a common setup right now.
7. Optional: axle back or catback exhaust
8. Optional: drop-in air filter
9. MCS double adjustable rear dampers - roughly $3k from Karcepts.
10. Overfill the oil 0.5-1.0 quart. Running at a full on the dipstick is not recommended for any motorsports activities.
*I believe that the 17x7.5 48mm RPF1 clears Brembo setups with a 7mm spacer, it will not clear without at least a ~5mm spacer.
Reasons for bigger/wider tires are for heat maintenance and higher top speed.
IMO, rear spacers are unnecessary.
I run everything listed besides MCS rear dampers. The MCS are extremely valuable if your site is bumpy.
I would recommend changing your transmission and rear differential fluid before ~10k miles. The OEM fluid is beat up after break-in. I run 30 or 40 weight oil, as it's commonly warm or hot at my events.