Engines / Internal Components

Everything that lives inside a Harley motor - camchest kits, camshafts, big bore kits, oil pumps, valvetrain and complete long blocks. This is the most technical corner of the catalog, and the one where getting the fitment right matters most.

What Is Here

The bulk comes from Feuling and S&S Cycles: camchest kits in gear and chain drive, camshafts, cam plates, cam chains, bearings and tensioners, oil pumps, lifters, pushrods, rocker arms, valve springs, head bolts and fastener kits. Displacement work runs from bolt-on big bore kits through Monster and power package kits to complete long blocks and engine cases. Revolution Performance supplies cylinder and piston work, and Trask adds forced induction.

Engine Parts Go By Cam Chest, Not By Model

This is the thing that catches people out. Two Harleys of the same year with the same badge can take completely different cams, plates, tensioners and oil pumps, because what matters is which engine generation is in the frame.

Evolution - Dyna Evo · Bagger Evo '84-'99
Early Twin Cam (spring tensioner) - Touring '99-'06 · Dyna '99-'05. Softail runs '00-'06.
Late Twin Cam (hydraulic tensioner) - Touring '07 & up · Dyna '06-'17. Note the Dyna changed a year early.
Milwaukee-Eight - Bagger M8 Motor

Shop By Bike

Narrowing by platform is the fastest way to a part that fits:

Bagger Engines / Internal Components · Dyna Engines / Internal Components · Sportster Engines / Internal Components · FXR Engines / Internal Components · Softail Engines / Internal Components · M8 Softail Engines / Internal Components