Comp Cams Camshaft - Mutha' Thumpr - Hydraulic Roller - Lift 0.558 / 0.542 in - Duration 291 / 311 - 107 LSA - 2000 / 5800 RPM - Big Block Chevy - Each-11-601-8--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO