Torque Solution Rear Differential Mount Inserts: Mitsubishi Evolution VIII-IX 2003-2006Torque Solution Rear Differential Mount Inserts Applications: Mitsubishi Evolution VIII IX 2003 2006 ( Non AYC ) These Solid Polyurethane bushings are much harder compared to the OEM units. By replacing them with these harder Polyurethane units you are able to get rid of the unwanted slop and flexing of the stock units which allows for the power to go into rotating the tires, instead of flexing the rubber. Giving you better feedback, sharper response,