Engine

Active filters
High-quality, fuel-resistant cover seal engineered for long-term reliability. Made in the USA.
Stock-height long-block replacement for Evolution engines. Includes performance heads, pistons, valve springs and a 508 camshaft. EFI compatible; fuel/ignition sold separately.
Durable Bolt-In Valve Stem with metal bottom and rubber seal for optimal performance.
Durable retention plate for gear-drive cam systems. Recommended for use with gear-drive cams. Made in the U.S.A.
High-quality replacement parts for valve stem kits to ensure optimal motorcycle performance.
High-quality replacement parts for valve stem kits to ensure optimal motorcycle performance.
Carbureted V80 assembled engine that fits stock '84–'99 Evolution Big Twin frames; upgraded S&S carburetor, cam, heads, and single-fire ignition.
Computer-designed cam set made from alloy steel billets with heat-treated finish; made in the USA. Installer must verify clearances prior to installation.
Computer-designed alloy steel cam set, heat treated and made in the USA. Installer must verify coil bind and valve clearances.