TSM330- a Z4 with an M3 motor sounds serious! s65 or s54?
BTW, I am still trying to figure out if I want to go back to 3.64 or 3.38- with the 3.38s do you hit 5th gear at the Glen at all or are you able to keep it in 4th on straits? I have been playing around with a gear ratio calculator and am trying to figure out what will be the best compromise for a car that sees 20,000 miles a year and a hald dozen auto crosses and hopefully 4 track weekends.
330i ~ BMW Perf. Susp. ~ M3 Front susp ~ BMW Perf Exhaust ~ 3.38 lsd ~ SF71 Alf CSL reps ~ Pilot Super Sports ~ AA Tune ~ 335is front brakes ~ over 155,000 miles hardly broken in! WTB: e93 M3 Front Sway Bar