Engine

Active filters
Directs air through a side scoop to cool cylinder heads; includes a high-powered waterproof fan, temperature switch (activates at 140°F), manual override, wiring and hardware. Plug-and-play installation with no drilling. Not for "Twin Cooled" models.
Quality pinion shaft bushing manufactured in the U.S.A. Precision fit for reliable performance.
High-precision wrist pin bushing machined to tight concentricity tolerances with a lead-in edge for easy installation.
Precision-machined wrist pin bushings hold concentricity to less than .0002" and feature a lead-in edge for easy installation. Made in the U.S.A.
Powerglide™ Steady Roll tappets with a Steady Roll bronze bushing, billet steel body and enhanced lubrication for longer service life.
Durable rocker arm shaft for precise valve-train operation. Made in the U.S.A.
Precision-machined motor sprocket shaft for reliable power transfer. Made in the U.S.A.
Precision pinion gear shaft engineered for smooth gearbox operation. Made in the U.S.A.
Precision-machined Powerglide™ hydraulic tappets, hand-fit for exact cam timing and extended roller life.
Precision billet-machined tappets, hand-fitted for exact cam timing and improved roller life.
Precision roller assembly with larger outer rollers, smaller pin bearings for higher rpm, and an enlarged axle that eliminates internal movement. Made in the U.S.A.