Fully assembled cylinder heads with large 1.940" intake and 1.575" exhaust valves for improved low- and midrange performance.
Deckable to 0.060" to raise compression; supports cams up to .650" lift; compatible with stock rocker boxes and manifolds.
Fully assembled cylinder heads with large 1.940" intake and 1.575" exhaust valves for improved low- and midrange performance.
Deckable to 0.060" to raise compression; supports cams up to .650" lift; compatible with stock rocker boxes and manifolds.
Replacement kit includes cylinders, forged pistons, rings, wrist pins, and gaskets; only for 88" motors. Professional assembly and clearance checks required.
Complete Big Bore cylinder kit with cylinders, pistons, rings and gaskets; easy installation and made in the USA. Professional installation recommended.
Durable Big Bore upgrade with premium aluminum cylinders and cast-in iron liners. Kit includes pistons, rings and gaskets. Made in the USA. Requires skilled installation.
Cylinders with a stock bolt pattern, bored slightly under nominal size and left un-honed; designed for 124" hot set up kits and '99-'17 Twin Cams. Requires crankcase machining.
Complete cylinder and piston replacement kit for 80" Shovelhead engines that preserves stock compression; includes pistons, cylinders, rings, gaskets and mounting hardware. Made in USA.
Complete big-bore cylinder and piston kit with forged pistons, gaskets, and hardware; ideal for stroker engine builds. Made in the U.S.A.
Bolt-in big bore kit with cast ductile iron sleeves for improved heat transfer. Complete kit includes cylinders, forged pistons, rings, pins, clips and gaskets. Not for use with S&S 79cc heads.
Premium top-end gasket kit. Made in the USA. Rocker box gaskets sold separately.
Complete top-end gasket kit with head, base and exhaust gaskets plus O-rings. Made in the U.S.A. Rocker box gaskets sold separately.
Precision oil pump idler gear for Big Twin models; engineered for reliable operation.