I had the Reyland Ap vauxhall kit on my nova and they were awesoem and NEVER let me down on any trackday or the serious use they got at the ring.

My mate does run 330mm Ap's on his 3 door and it seems to eat brakes on any track day, no idea why as I've been told its very unusual but I know it pisses him off as there £350 for a set of rotors which makes track days damn expensive .

Any ideas what could cause them to warp so quick ? and before anyone asks yes he does do a steady warm up lap and cool down lap.