Engine

Active filters
- Bolt-on power: +40–50% on stock 107", 114" and 117" M‑Eight motors.
- Compressor and turbine housing with Garrett internals; plenum with integrated blow-off valve.
- Includes injectors, spark plugs, boost gauge with mount, oil feed/drain lines, custom cam cover, tune files, hardware and gaskets.
- Requires Thundermax ECM (sold separately). Does not fit Twin Cooled or non-removable fairing lowers. Offroad use only.
- Made in the USA.
Compact oil cooler kit with AN #6 fittings, supplied clamps and reducers, and precision-machined components for durable, easy installation.
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.
Protects the oil sending unit sensor and connector; precision-machined for a snug, low-profile fit. Made in the USA.
Provides neat coverage for the oil sending unit sensor and connector. 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.