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.
Increases pressure relief valve pop-off psi. Spring alone provides the correct spring rate to control pop-off pressure and oil flow in the bypass port. Made in the United States.
Complete two-piston kit with precision-fit rings and enhanced pin oiling for dependable sealing and long life.
Forged, precision-fit piston kit with ArmorGlide® skirt coating and force-fed pin oiling. Value-pack includes two pistons, rings, pins, and circlips.
Forged aluminum piston kit with ArmorGlide® skirt coating; includes two pistons, rings, piston pins and circlips for a complete install.
Forged aluminum piston kit with ArmorGlide® skirt coating; includes two pistons, rings, piston pins and circlips.
Broad midrange power band camshaft with a smooth lobe design. Made in the USA. Performance pushrods, lifters and clutch recommended.
Power band for modified engines; bolt-in for stock 96", 103" and 110" engines. Smooth cam-lobe design. Made in the USA.
Complete kit with roller bearings, ARP® bolts, gaskets and hardware to install bolt-in and high-lift camshafts.