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. (1970-1976) GM Pontiac 455 CI 7.5L V8. Bore 4.151, Rings 5/64-1/16-3/16, Pin Diameter .9804. Flat Head w/2 valve reliefs 8.2:1 Compression ratio. THIS PISTON IS NOT AVAILABLE IN STANDARD SIZE
