89mm cylinder P/N 59030038000 removed from a low time 2003 450EXC. Complete with piston, pin and rings. This cylinder will fit KTM RFS 400, 520 and 525 engines. The height of this cylinder, gasket surface to gasket surface, is 84.00mm. This cylinder bore is in very nice condition with no scoring or noticeable coating wear. Will fit the RFS engine with an 89mm cylinder bore and a 84mm cylinder height.