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.
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 big-bore cylinder and piston kit with forged pistons, gaskets, and hardware; ideal for stroker engine builds. Made in the U.S.A.
Direct-fit big bore kit for improved displacement and performance. Includes cylinders, pistons, rings and gaskets. Professional installation required.
Custom aluminum cover with ball-milled finish. Sold individually.
Polished chrome billet inspection cover in ball-end milled or smooth style; includes chrome hardware. Sold each.
Billet-style inspection cover with included mounting hardware. Sold individually.
Direct-fit replacement gasket kit for rocker box to prevent oil leaks and restore the seal.
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.