KB PERFORMANCE Hypereutectic Piston Kit

KB PERFORMANCE Hypereutectic Piston Kit (103" Twin Cam / 96" Big Bore) Upgrade your engine with the KB PERFORMANCE Hypereutectic Piston Kit engineered for tight tolerances, excellent ring seal, and long service life. Designed for a 3.875" bore with +0.010" oversize and 10.0:1 compression ratio , this kit is built from high-strength hypereutectic aluminum for reliable street performance. Key Features Made from T-5 heat-treated 390 hypereutectic aluminum alloy Precision fit helps promote longer piston and ring life Diamond-machined pistons held to ±1 gram weight consistency and < .0005" piston-to-piston tolerance Kit includes two pistons, pins, spiral-lock pin clips , and Hastings moly rings Rings/pistons sold separately: replacement piston rings are not included Can be installed tighter than other pistons to reduce piston rock and improve ring seal Important: follow included guidance for top ring end gap and correct clearance Specifications Application: 103" Twin Cam, 96" Twin Cam Big Bore Product Type: Piston Kit (Units: Kit) Bore Size: 3.875" (+0.010") Compression Ratio: 10.0:1 Stroke Length: 4.375" Piston Head: Flat Top Piston Material: Hypereutectic Alloy Ring Material: Moly Coated Displacement: 103" Riding Style: Street Weight: 2.66 lbs