COMP Cams Camshafts 54-777-11 NSR Drift 233/243 Hydraulic Roller Cam for GM LS GEN III/IV The best possible drop-in cam for a budget 5.3L Drift / Road Race / Drag build with Spintron-proven 7500 RPM+ stability. It is a good idea to replace the timing chain. 294LSD14
