1 SET KB110.040/1 SET 4000BD8.045

Keith Black Hypereutectic pistons are a great choice for high performance marine, drag race, circle track, street or towing application builds. The low expansion 390 alloy with 16 percent silicon allows for a tighter piston to wall running clearance. Fully machined head and valve reliefs, Triple Spiral Lock Rings, CNC machined pin bores produce straight and accurately sized bores, Accumulator Groove aids with compression ring seal, Machined in Oil Returns, Diamond Finished Skirts, Mini Grooves to reduce scuffing and overheating, Wrist pins and spiral lock included, 1/16 x 1/16 x 3/16 rings not included.