All necessary components from top to bottom of the camchest Each part works and functions together in total harmony Provides maximum reliability, longevity, peak performance and the coolest engine and oil temperatures obtainable Includes : Feuling HP+ high volume oil pump, high flow billet Camplate, REAPER Series Camshafts, HP+ hydraulic roller Lifters, adjustable Pushrods, Timken/Koyo Bearings, Gaskets, O-rings, hardware, ARP fasteners, washers, moly lube and Loctite Conversion chain drive kits allows owners to update old mechanical style cams and tensioners to new hydraulic tensioner system Conversion camshafts for 99-06 Twin Cam engines; these camshafts utilize the 99-06 inner cam journals with the 07-13 outer cam journals allowing the use of the 07-13 camplates, oil pump, hydraulic chain tensioners and chain drive system Conversion cams use early 99-06 style inner cam journals with late style 07-13 outer journals requiring late style hydraulic chain tensioners, sprockets and chains.