Brand: Keith Black/KB Pistons
Product Line: Keith Black Hypereutectic Pistons
Part Type: Pistons
Part Number: KB239
Bore (in): 3.445 in.
Bore (mm): 87.500mm
Piston Style: Flat top, with two valve reliefs
Piston Material: Hypereutectic aluminum
Compression Distance (in): 1.594 in.
Piston Head Volume (cc): +5.00cc
Wrist Pin Style: Press-fit or floating
Pin Diameter (in): 0.901 in.
Piston Ring Thickness: 1.5mm x 1.5mm x 4.0mm
Quantity: Sold individually.
Notes: Piston and pin gram weight: 376/107g.
Piston, Hypereutectic, Flat Top, 3.445 in. Bore, 1.5mm, 1.5mm, 4.0mm Ring Grooves, Mopar, 2.2L, Each

Keith Black hypereutectic pistons are serious pistons that don't cost an arm and a leg. 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!