Engine

Active filters
Compact oil cooler kit with AN #6 fittings, supplied clamps and reducers, and precision-machined components for durable, easy installation.
Reduces oil temperatures using engine temperature and vehicle speed. Quick 15-minute install; no oil cooler removal. Plug-n-play on M8 models with compatible ECM. Made in the USA.
Transparent cam cover designed to match Assault series air cleaners. Made in the USA.
Complete oil cooler kit with AN #6 fittings and frame-mount clamps.
CNC-machined billet aluminum construction for precise fit.
Complete gasket and seal kit for the deflector plate that prevents leaks and restores reliable sealing. Made in the USA.
High-performance valve spring kit engineered for racing applications. Progressive springs and a complete set for one engine; made in the USA.
Precision-machined shouldered valve guide in nickel bronze for superior wear resistance and heat conductivity. Sold each.
High-density powdered metal valve seats offering exceptional wear resistance and thermal stability. Made in the USA. Typically supplied as two intake and two exhaust seats per application.
Precision-machined cast-iron valve guide compatible with unleaded fuel; OEM-style replacement.
Precision C63000 bronze valve guides with tapered nose design for improved flow. OEM style; top hat seals sold separately.
Precision-machined cast iron valve guide compatible with unleaded fuel and all valve-stem materials. Made in the USA.
Precision-machined shouldered valve guide compatible with no-lead fuel; accepts special seals (sold separately). Made in the U.S.A.