Upgrade Kit - K350. This kit replaces some of the EXP clutch parts while reusing some of the O.E.M. clutch parts. The following is a summary of what is replaced and what is reused: The O.E.M. center clutch inner and outer hub - these O.E.M. clutch components are reused for the RadiusX product. All EXP TEC drive plates and the EXP lining plate (0.048" or 1.2 mm) will be replaced with RadiusX TEC drive plates and the RadiusX lining plate (0.040"” or 1 mm). All O.E.M. friction disks will be replaced with Rekluse TorqDrive® disks. The O.E.M. Bellville spring and spring seat will be reused. The EXP pressure ring spacer will be replaced with the RadiusX pressure ring spacer. The EXP pressure plate will be reused. The EXP base will be reused. All of the O.E.M. drive pins will be reinstalled. The gasket used with your EXP clutch will be reused.