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. (1971-1993) Chrysler, Dodge, Dodge Truck, Plymouth 360 5.9L V8 Dish top Piston. Bore 4.000, rings 5/64-3/16, Pin Dia 1.0939. recessed Head 7.5:1 Compression Ratio.