COMP CAMS Comp Cams Bbc Cam K-Kit 283Thr7 K11-600-8 Camshaft / Lifters / Springs / Timing Set - Thumpr - Hydraulic Roller - Lift 0.547 / 0.530 in - Duration 283 / 303 - 107 LSA - 1900 / 5500 RPM - Big Block Chevy - Kit MSRP: $1,947.31 Was: Now: $1,622.76