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. (1985-1993) Chrysler, Dodge, Plymouth, Dodge Trucks 318 V8 5.2L cast replacement piston. 3.910 Bore, 5/64-3/16 Rings, .9842 Pin diameter.