Product Description
Bore (in): 4.340 in.
Bore (mm): 110.236mm
Piston Style: Step head, with a trough
Piston Material: Hypereutectic aluminum
Compression Distance (in): 1.992 in.
Dome Height (in): 0.140 in.
Piston Head Volume (cc): +3.50cc
Wrist Pin Style: Press-fit or floating
Pin Diameter (in): 1.094 in.
Piston Ring Thickness: 5/64 in. x 5/64 in. x 3/16 in.
Quantity: Sold as a set of 8.
Notes: 0.140 inch quench dome height.
Compression Ratios:
72 -10,4
80 - 9,7
84 - 9,3
88 - 8,9
Keith Black hypereutectic pistons are made from 390 alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated hypereutectics. Their 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves make these pistons outstanding for performance applications. On top of that, Keith Black's hypereutectic pistons have a lightweight, rigid-rib skirt design that stabilizes the piston in the bore. All of this adds up to pistons that fit tighter than forged types, provide improved oil control, reduce blowby, increase ring life, eliminate cold start-up knocking, and won't cost you an arm and a leg!
