As low as $56.28/mo with or . (Pay in 4 interest-free payments)
KB PERFORMANCE Hypereutectic Piston Kit for 80" Evolution Big Twin Upgrade your 80" Evolution Big Twin with the KB PERFORMANCE Hypereutectic Piston Kit. Built for confident street performance, this kit delivers strong durability and improved ring sealing thanks to precise manufacturing and tight piston-to-bore fit. Key Features Made from high-strength, T-5 heat-treated 390 hypereutectic aluminum alloy for reliable strength. Designed for a tighter fit to help extend piston and ring life . Diamond-machined pistons with ultra-precise balancing and consistent tolerances: ±1 gram and less than .0005" piston-to-piston variance. Each kit includes two pistons, pins, spiral-lock pin clips, and Hastings moly rings . KB pistons can be installed tighter than many alternatives, reducing piston rock and improving ring seal . Optimized thermal design requires careful attention to top ring end gap during installation. Specifications Units: Kit Displacement: 1340 cc (80") Piston Material: Hypereutectic Alloy Riding Style: Street Bore Size: 3.498" (+0.030") Compression Ratio: 8.6:1 KB PERFORMANCE delivers precision-engineered pistons for builders seeking strong performance and dependable street reliability.
Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
Allow a tighter fit and longer piston and ring life
Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
Replacement piston rings and pin lock rings available separately
KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.
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