[.030   Bore 4.155  ]

Set of (8) Power Forged pistons compatible with Olds 455 Coated 4-Barrel Pistons & matching Moly Rings +.030. Compatible replacements for Oldsmobile 455 - 4.155" bore (at .030" over bore) Recessed head .142" deep x 2.950" diameter. DurOshield skirt coated piston. 1968-70 Car (USA); High compression 1972-75 Industrial (USA); Must be used w/fuel of 96 octane or higher. 5/64" 5/64" 3/16" ring grooves Pin diameter: .980"; pins included For stock length rods Press-fit only Stock 4.250" stroke