Feuling Hydraulic Cam Chain Tensioner Assemblies For Harley Twin Cam Tensioner housings are precision machined from billet 6061 aluminum, pads are injection molded Nylon with Teflon added to increase wear and friction resistance. Tensioners are single piston duplicating the output pressure of stock units. Features: Include ARP 12-point chrome moly hardware Inner replacement OEM 39969-06 Outer replacement OEM 39968-06 Note: Fits all 2007-2017 Twin Cams and 2006 Dyna models. Also fits conversion cam plates designed to run 99-06 camshafts