Keith Black Performance Hypereutectic Piston Kit, 3.875″ Bore, 10:1

• Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy

• Allow a tighter fit, longer piston and ring life

• Diamond-machined pistons are held to plus or minus on gram weight and less than .005″ tolerances between pistons

• Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings

• Replacement piston rings and pin lock rings available separately

• These pistons can be installed tighter than other pistons, resulting in less piston rock and better ring seal.

• Special attention is required to the top ring end gap, refer to instructions for correct piston and ring installation