I was looking for some quick opinions on an M9 setup for my IROC from those who have been there done that. Car will see some autos-x, lots of steet driving on the weekends, and possibly the drag strip... but kind of unlikely. At this point I am looking to validate my thoughts more than anything. Thanks.

My big questions are:

1.Should I get a stock width rear or should I get it the same as the 4th gens. I have 18in. IROC rims and like them.

2.What rear brake setups have other used and like... wilwood brakes seem popular on the m9. I need to call SSBC as I have those upfront and would like them in the rear but I am out of the country at this time so will call when I get back... Any thoughts on 4th gen rear brakes.

3. Any thoughts as to gear ratio: I would really like 3.10s but my choices are 3.0 or 3.25 so I was going to go with 3.25... I think I will loose to much traction with numerically larger gears and to much cruising mpg when I can just turn up the boost if I need less traction later. After all it will spend most of the time on the street.

General Specs
TPI w built 350 - will be getting a suppercharger or turbo car is pushing 400hp and 400 ftlb as it sits.
Built 700R4.