Includes PPA and Transmission Disc. Flywheel Step Specification: Early w/ .070" shims (1.338" - 1.342"), late w/o shims (1.407" - 1.411")The M3381123N 14" LuK Diaphram Clutch Unit - New fits equipment brands such as: Massey FergusonThe M3381123N is a substitute for the following discontinued products: M3381122N, M3381123R, M3381122R, M3388927R