2007 Set-up
My complete set-up for 2007 currently stands as follows:
- STI Performance panel filter
- 2.5" highflow Prodrive axleback muffler section
- Whiteline adj. 27/29mm front swaybar
- Alignment (-1.4 camber front, factory -1.2 rear)
- CG Lock (seat belt tensioner)
- Pair of 3mm spacers for my front wheels only
- 17x7 18lb +55et Subaru SPT wheels
- 225/45/17 Kumho Victoracers
The 2.5" stainless steel Prodrive axleback shaves 7.5lbs from the stock system, and dynos have shown an increase of 3-4whp and 5-6 wtq.
As stock '06+ WRXs are making 200-205 whp on Mustang dynos, it is estimated that true stock power output is ~255hp at the crank (factory rated at 230hp). With the Prodrive axleback and STI panel filter, I'd estimate my car is making somewhere around 260hp at the crank (~210whp).
The brand new 17x7 Subaru SPT wheels I bought use my stock factory offset (+55et) and weigh 18lbs a piece (3lbs lighter than my stock wheels).
I got some used 225/45/17 Kumho Victoracers and they're now mounted & balanced and ready to go:
245/40/17 Hoosier A6's will go on later this Spring prior to my National Pro Solo in June!
In regards to my alignment, as I can't legally adjust rear camber from the factory setting (rear camber bolts are unadjustable), I had the technician crank in as much front camber as possible w/o any cross-camber. The most he could get was -1.4 degrees per side. I had my toe set to 0.0 all around and didn't want to add rear toe-out per the following comments by Brian Priebe in the May '06 issue of Sports Car:
Based on his comments, I'm trying to focus on adding as much front grip as possible, to make the rear-end easier to slide on course in a
predictable manner. Through my new front-end alignment, 3mm spacers upfront and adjusting tire pressures front & rear, I should be able to accomplish this...