Torque Solution Solid Differential Bushing w/ Billet InsertsTorque Solution Solid Rear Differential Mount w Billet Inserts Applications: Mitsubishi Evolution X GSR & MR The solid differential mount will eliminate movement of the rear end in the subframe. By replacing the rubber mount with this solid 6061 billet unit 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,