Comp Cams Camshaft - Thumper NSR Stage 2 - Hydraulic Roller - Lift 0.541 / 0.539 in - Duration 280 / 299 - 113 LSA - 1800 / 6500 RPM - GM LS-Series - Each-54-702-11--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO