Kit allows you to update early style mechanical cam chain tensioner Twin Cam engines to the late style hydraulic cam chain tensioner systems while mixing and matching components. Whether using a Feuling camchest kit with conversion camshafts, Feuling conversion camplate oiling system with stock style 1999-2006 camshafts and or conversion camshafts with a combination of factory, SE, Delkron or S&S oiling systems, these kits offer endless combinations Kits include: Cam and crank sprockets, sprocket alignment spacers, inner and outer cam chains, inner and outer hydraulic tensioner assemblies For use with conversion camshafts when updating 2002-06 Delphi ignition system engines without cam position sensor to the hydraulic cam chain tensioner system. Requires an 2007-17 style oiling system without position sensor to the hydraulic cam chain tensioner system; Designed to work with:; Camchest Kits 712-511; Oiling systems 176-613, 423-954, 420-110; Requires Conversion Camshafts 723-425, 405-746, 405-747, 912-946; Kit Includes the Following Feuling Components:; Outer Chain (OEM 25675-06); Inner Chain (OEM 25683-06); Outer Crank Sprocket 17-Tooth (OEM 25673-06); Outer Cam Sprocket 34-Tooth (OEM 25728-06); Outer Hydraulic Tensioner Unit (OEM 39968-06); Inner Hydraulic Tensioner Unit (OEM 39969-06); Spacer Kit Includes the Following:; Thrust Washer, Front Cam .100 (OEM 25731-06); Spacer .110 for cam alignment, use as required (OEM 25731-06); Spacer .120 for cam alignment, use as required (25734-06); Spacer .130 for cam alignment, use as required (OEM 25736-06); Spacer .140 for cam alignment, use as required (OEM 25737-06); Spacer .150 for cam alignment, use as required (OEM 25738-06)