Actually, I had to modify a 350Z 14" Front kit and a Skyline 14" Rear kit. I don't track my car, but, from what I understand I am a bit overbiased on the rear brakes for competition. On the other hand, stops from high speeds are VERY controlled as there is minimal dive. The car just seems to "sink" under heavy braking......... I LOVE it. Plus, the "WOW" factor of F/R 14" rotors with the bigass red calipers is cool too.