Comp Cams Camshaft / Lifters - Xtreme Energy - Mechanical Flat Tappet - Lift 0.520 / 0.540 in - Duration 282 / 290 - 110 LSA - 2400 / 6800 RPM - Small Block Chevy - Kit-CL12-678-4--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO