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. Chevrolet 153, 230, 283 (1957-1970) /GMC 230, 283 (1963-1969) /Checker 230 (1965-1968). Bore (in): 3.875 in. Bore (mm): 98.425mm Piston Style: Flat top, with four valve reliefs Piston Material: Cast aluminum Wrist Pin Style: Press-fit Pin Diameter (in): 0.928 in. Piston Ring Thickness: 5/64 in. x 5/64 in. x 3/16 in.
