If you're looking at GC, give them a call and discuss your needs. They will be more than happy to recommend spring rates. You are essentially driving a Z3 M coupe so they should have plenty of info and experience.
I'd say if you're looking at GC to also check out TCK SAs. When I had 350/500 springs the ride could be made as comfortable as stock. I've bumped up to 450/600 now for track/autox and it is still a decent ride. __________________ ~Dave~
98 328ti Morea Grun slicktop
11 128i space gray slicktop
13 JGC WK2 Deep Cherry
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