Je Pistons Piston - Big Block Inverted Dome - Forged - 4.500 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Minus 11.50 cc - Big Block Chevy - Set of 8-257956--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO