KB HYP PISTON KIT CHRY 383

These Keith Black hypereutectic pistons are made from 390 aluminum alloy and heat-treated to T6 standards, making them 30 percent stronger than ordinary untreated hypereutectics. They feature 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves, making them outstanding for performance applications. The lightweight, rigid-rib skirt design stabilizes the piston in the bore, providing improved oil control, reduced blowby, increased ring life, and eliminating cold start-up knocking. Sold as a set of 8.