All necessary components from top to bottom of the camchest All parts work and function together in total harmony Provide maximum reliability, longevity, peak performance and the coolest engine and oil temperatures obtainable Conversion chain drive kits allows owners to update old mechanical style cams and tensioners to new hydraulic tensioner system Kits include Feuling? Race Series? high volume oil pump, high flow billet cam plate, REAPER? Series camshafts, Race Series? hydraulic roller lifters, adjustable pushrods, Timken?/Koyo? bearings, gaskets, O-rings, hardware, ARP? fasteners, washers, moly lube and Loctite? Kits utilize the 99-06 inner cam journals with the 07-17 outer cam journals allowing the use of the 07-17 cam plates, oil pump, hydraulic chain tensioners and chain drive system Installation of gear drive cams will require separate purchase of S&S or Andrews 4-gear drive kit Made in the U.S.A.