Comp Cams Camshaft - Big Mutha' Thumpr - Hydraulic Flat Tappet - Lift 0.500 / 0.486 in - Duration 295 / 313 - 107 LSA - 2500 / 6400 RPM - Small Block Chevy - Each-12-602-4--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO