This is a full rebuild kit less diferential parts. Using only the original manufacturers of the bearings such as RHP because all the "budget" bearings are simply not good enough for longevity or for performance use. This is a full kit of bearings except the 2 rollers under 1st/2nd and 3rd gear which often do not get checked. Complete set of gaskets and seals for rebuild and fitting gearbox back to engine, baulk rings and new layshaft with two large and one small bearing. Also with idler gear bearing for gearcase this kit is for A plus Rod change gearbox only with 18mm thick mainshaft bearing where the Ist motion shaft fits. This is the kit for STRAIGHT CUT GEAR sets.