Comp Cams Camshaft - Xtreme Energy - Hydraulic Roller - Lift 0.510 / 0.510 in - Duration 270 / 276 - 110 LSA - 1600 / 5400 RPM - Big Block Chevy - Each-11-422-8--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO