Dyna Twin Cam ‘99-‘05

Engine and cam chest parts for the early Twin Cam Dyna, 1999 through 2005 - the years running the original cam chest with the spring-loaded chain tensioner.

Why The Dyna Cuts At '05

The Dyna got the revised cam chest a year before the rest of the range. Touring and Softail carried the early chest through 2006; the Dyna changed over for 2006, so an '06 Dyna belongs with the later parts, not these. If you ride an '06 Dyna, go to Dyna Twin Cam '06-'17 instead.

The Tensioner Question

The early cam chest uses a mechanical spring tensioner riding on the cam chain. The shoe wears, and what wears off goes into the oil. It is the usual reason one of these motors gets opened up, and it is why so much of this page is conversion kits - Feuling's OE+, HP+ and Race Series conversions swap in the hydraulic system the factory adopted later. They include conversion camshafts because early and late cams are not interchangeable.

What Else Is Here

Gear drive and chain drive camchest kits, camshafts, cam plates, cam bearings, lifters, pushrods, valve springs, oil pumps, breather kits, head breathers and fastener kits from Feuling, with big bore kits, power package kits and complete Twin Cam long blocks from S&S Cycles.

Why This Collection Is Split By Motor

Bolt-on parts go by platform. Engine parts go by cam chest. Two Harleys can wear the same badge, the same year, and still take different cams, plates, tensioners and oil pumps because the motor inside them changed. That is why the store keeps a separate page for each engine generation instead of listing everything under one platform.

Before You Order

Displacement, cam chest generation and whether the motor has been apart before all decide what you need. The fitment list on each product page carries the manufacturer's exact year and model coverage - read it, and if you are building rather than repairing, work out the whole combination before buying the first piece. Performance claims belong to the manufacturer; what any part is worth depends on the rest of your build.