Howards Racing Components Camshaft / Lifters / Hydraulic Roller - Retro Fit - Lift 0.500 / 0.510 in - Duration 278 / 284 - 112 LSA - 1800 / 5400 RPM - Small Block Chevy - Kit-CL110245-12--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO