Thinking of getting into an M5 and have a buyer for my M3 in stock trim. I'll be parting out my G-Power SK2 Clubsport supercharger, RPi GT exhaust and H&R springs. If anyone has an interest in these parts, contact me. The SC and exhaust are still installed, so anyone local to SoCal can test drive the car to get an idea of the performance. I've had the kit for 15,000 miles and haven't had a single problem. Power is 480WHP (600HP) on 91 pump gas and 545WHP (680HP) on 100 race gas @ 8psi of boost.