Steve40th wrote: I think it is a valid upgrade. I went from the factory 12 inch rotors, to GS calipers and rotors, then to C5 brakes on my C4. I warped the C4 stuff fairly easy, at autocrossing and when trying to slow down from 120 mph runs at the drag strip. I have had ss lines,good brake fluid in all set ups, and only two tires, BFG KD's and Firestone SZ50's. I have used several different pads. if I wasnt racing the J55/GS set up with new fluid and Hawk pads are just fine. For HPDE, spend the money on real brake system. Unless you do it once or twice a year. Also, the C6 calipers are better than the C5's as they tend to spread easily on HPDE type events.
I agree, any upgrade is valid. Also on the C6 calipers.
For HPDE's, it depends on your driving level and like Steve said, the number of events. Most guys here run 5-6 events with stock or a slight upgrade. Guys that are running timed laps (Club Trails/Time Trials) usually upgrade to the whole system.
