For budget or stock-style rebuilds, it's hard to beat the value of Sealed Power cast pistons. They are made from high-quality aluminum alloys and feature a carefully controlled casting, heat-treating, and CNC-machining process. And, because they're designed and manufactured to exceed OEM specs, they'll provide improved reliability, performance, and a long service life. (1968-1976) GM Oldsmobile 455 V8 replacement Piston. Bore 4.250, Rings 5/64-3/16, Pin Dia .9806
