KB HYP PISTON KIT FORD 408W

This Keith Black Hypereutectic Piston Kit is designed for high-performance Ford Small Block V8 Windsor 408 cubic inch (6.7L) stroker engines. These pistons are cast from a low-expansion 390 alloy with 16% silicon, allowing for tighter piston-to-wall clearances. Key features include fully machined heads and valve reliefs, triple spiral lock rings, CNC machined pin bores for accuracy, an accumulator groove to improve compression ring seal, machined-in oil returns, diamond-finished skirts, and mini grooves for reduced scuffing and overheating. The kit includes wrist pins and spiral locks, but piston rings are sold separately (requires 1/16, 1/16, 3/16 ring pack). It's suitable for various high-performance applications such as marine, drag racing, circle track, street, or towing builds.