Comp Cams Camshaft / Lifters / Timing Set - Thumpr - Hydraulic Flat Tappet - Lift 0.479 / 0.465 in - Duration 279 / 297 - 107 LSA - 2000 / 5800 RPM - Small Block Chevy - Kit-GK12-600-4--Notes: Thumpr Series State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO