Set of (8) Pistons and matching rings compatible replacements for 1968-76 Oldsmobile 455 cid 4-BBL engines. Available your choice of over Std, .020", .030" or .040" over sizes! These piston are for stock length rods, stock stroke, PRESS PINS ONLY & 1.725" compression distance.5/64", 5/64", 3/16" ring package. Please click on box for over size needed before placing in Cart!