Precision-machined oil system packs for M8 engines that increase oil flow, scavenge volume and pressure while reducing temperatures and wet sumping. Includes pump, lifters, high-flow camplate and installation kit.
Active filters
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.
Retainer rings that secure oil pump components for reliable lubrication and service.
Complete right crankcase roller bearing assembly. Includes rollers and retainer. Made in the U.S.A.
Precision J-form cylinder stud kit with eight studs, moly assembly lubricant, and thread sealant. Stock replacement and reusable; manufactured by ARP® in the USA.
Made in the USA. Screw lock nuts with 9/32"-32 threads for secure valve adjustments.
0.060" thick locking washer made in the U.S.A. for dependable fastening.
Lock-style threaded fasteners that resist loosening and secure shaft connections.
Replacement spacers for bearing housing, for main shaft and countershaft applications.
Replacement flywheel thrust washers designed to meet or exceed OEM specification.
Complete gasket and bushing set for oil pump service. Made in the U.S.A.
Replacement countershaft bearing retainer washers.
Replacement OEM first gear thrust washers for reliable countershaft support and smooth shifting.
High-quality neck post bearing for reliable steering and long-lasting performance.
Durable piston pin clips for a wide range of Harley models. Meets or exceeds OEM specs. Made in the USA.