Reduce starting compression with easy-install manual release valves. Drill and tap each cylinder head 10 mm x 1.0 mm. Fits all Big Twin models.
Active filters
Replacement component for Big Twin models; precision-machined to restore lubrication performance and reduce noise.
One-piece nitrided stainless-steel valve with stellite tip for superior wear resistance and reduced friction. Made in the USA.
One-piece Stellite-tipped nitrided valve delivering superior wear resistance, reduced friction, and optimized flow. Made in the USA.
High-strength pinion shaft nut designed for secure gear-side installation and long service life.
Nitrided valve with stellite tip for reduced wear and friction; compatible with leaded and unleaded fuels. Made in USA.
Stellite-tipped nitrided stainless-steel valve offering superior wear resistance, lightweight profile, excellent flow, and fuel compatibility.
One-piece nitrided stainless-steel valve with stellite tip for reduced wear and improved flow.
Compatible with leaded and unleaded fuels; made in the USA.
One-piece nitrided valve with stellite tip for improved wear resistance and reduced friction.
Lightweight profile, corrosion resistant, compatible with leaded and unleaded fuels.
Precision-made valve lock keys with a 10° lock angle. Heat-treated and made in the U.S.A. Designed for reliable valve keeper service.
Precision-machined valve guide compatible with no-lead fuel and multiple valve-stem materials. Made in the USA.
OEM replacement dowels for HD® Evolution engines that ensure precise cylinder alignment and reliable fitment.
Plug-and-play cooler kit with a high-powered, waterproof fan and temperature-activated switch; includes wiring, hardware and instructions. Not for "Twin Cooled" models.
Low-profile billet tappet and pushrod cover kit; fits Twin Cam pushrod covers only; sits 1/2" lower than stock; includes gaskets, O-rings and screws; made in USA.
High-flow piston oiling jet kit designed for stock and high-performance flywheels; modified for stroker applications. Made in the U.S.A.
Exact-fit wrist pin bushing made in the USA. Oil holes must be drilled after installation.
Quality pinion shaft bushing. Made in the U.S.A.