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.
OEM-quality cast aluminum replacement pistons; kits include two pistons, wrist pins and clips.
OEM-quality replacement pistons for Twin Cam motors; includes two pistons, wrist pins and clips; accepts OEM or Hastings rings.
OEM-quality cast aluminum piston kit for Twin Cam motors; includes two pistons, wrist pins and clips.
Big Bore piston for Twin Cam engines, ideal for performance rebuilds and restorations.
Big Bore Piston designed for Twin Cam engines; precision replacement for performance upgrades and reliable operation.
Coated aluminum alloy pistons sold as a kit with wrist pins and clips; accepts OEM or Hastings rings (sold separately).
Direct OEM replacement; includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).
- Coated pistons reduce friction and help control operating temperatures.
- Includes two pistons, wrist pins and clips for a complete kit.
- Ideal for OEM replacement; rings sold separately.
Coated pistons reduce friction and improve durability; includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).
OEM-quality replacement piston kit includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).
Ideal OEM replacement; includes two pistons, wrist pins and circlips; accepts OEM or Hastings rings (sold separately).
OEM replacement kit with two pistons, wrist pins and circlips; accepts OEM or Hastings rings (sold separately).
OEM-quality replacement kit with two pistons, wrist pins and circlips; accepts OEM or Hastings rings.