S&S 640G Gear Drive Cam Kit Complete for 1999 - 2006 Twin Cam Models
Camshaft gear drive kits increase valve timing accuracy by eliminating timing chain lash and loosely-fit stock chain drive.
Reverses the rear cam's direction of rotation, providing additional operating clearance between cam lobes; as a result, higher cam lifts are possible with the gear drive kit.
Kits include cams, inner gears, outer drive gears, inner and outer bearings, gasket and instructions.
Material must be removed from the inner surface of the stock gear cover to install S&S gear drive cams.
A hydraulic press and other professional-level tools are required to install these kits.
S&S recommends that adjustable pushrod/cover kit PART #0928-0017 be used.
Cam bearings and gaskets must be replaced when installing new cams.
S&S part number 33-5181
Drag Specialties part number 2007-2640