Replacement oil pump drive shaft for Big Twin models. Direct-fit, precision machined.
Replacement check valve spring for oil pumps on Big Twin models. Made in the United States.
OEM replacement return plug for oil pumps. Precision-machined for a secure seal and reliable return flow.
- High-flow 2.250" chrome moly gerotor gears for increased oil volume
- Precision-machined relief valve; bench tested to seat at 30 psi, pop-off 55–60 psi
- 42% more scavenge volume and 68% more oil to bearings versus stock
- Magnet protection and corrected passages to reduce wet sumping and blow-by
- Requires matching high-flow cam plate (part #0932-0192) for optimized scavenge
Replacement spring and plunger assembly for oil pump pressure relief valve — increases pop‑off psi and restores proper bypass control. Bench‑test with PART #3801-0071.
Increases feed and scavenge capacity for M8 fourth generation engines; fits air-cooled models only.
Independent scavenge sections for flywheel and cam chest, debris screens, increased flow, adjustable relief valve, removable passage plugs for serviceability.
Independent scavenge sections, debris screens, magnet-protected cam chest, adjustable pressure relief, and increased flow capacity for dependable oil management.
Complete set of gaskets, oil seals and O-rings for top-end engine rebuilds.
Billet-aluminum cam plate with blue anodized finish. Removable passage plugs for servicing. Made in the United States.
Retainer rings that secure oil pump components for reliable lubrication and service.
Mounts Twin Cam 88 "A" motor into Evolution-style Softail or Rigid frames. Made in the USA.
Vibration-damping mount engineered to meet or exceed OEM specifications.