Engine

Active filters
Enhances the center of the oil cooler trim with a stylish guard. Easy to install and built in the USA.
Dresses up the oil cooler area with matching vent‑screen material; easy to install. Made in the USA.
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.
High-performance camshaft with Endurance Ramps for broad torque, reduced valve train noise, and billet steel construction.
State-of-the-art compression release valves that reduce hot starts and lower starter and battery loads. Sold as a set and made in the U.S.A.
State-of-the-art design to reduce hot starts and starter/battery loads. Custom molded knobs, sold in pairs, made in the U.S.A.
High-quality main bearing manufactured to original equipment manufacturer specifications for reliable performance.
Manufactured at leading OEM factories, mainly in Japan. Made to exact OEM specifications for reliable fit and performance.
Manufactured at leading OEM factories (mainly Japan). Made to exact OEM specifications for reliable crankshaft support and long service life.