KB HYP PISTON KIT FORD 372W

Keith Black Hypereutectic pistons are a high-performance choice for various engine builds, including marine, drag race, circle track, street, or towing applications. Made from a low expansion 390 alloy with 16 percent silicon, these pistons allow for tighter piston-to-wall running clearance. They feature fully machined heads, valve reliefs, triple spiral lock rings, and CNC machined pin bores. This kit includes wrist pins and spiral locks, but rings (1/16 x 1/16 x 3/16) are not included. They are designed for SB Ford 372W engines with a 4.020" bore, 3.640" crankshaft stroke, and 6.200" rod length.