An excellent kit for racers who maintain their own transmissions. Contains the "stuff" usually required when freshening up an existing competition transmission. Does not have valve body modifications or little used items. The kit does contain a high performance filter, clutches and steels as well as the seals, gaskets and bushings normally replaced on a rebuild. TCI® sources these components from the original equipment manufacturers utilizing such companies as Borg-Warner, Clevite, Federal-Mogul, National and Sealed Power.