Rear Differential Mount Insert Kit 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, more predictability on throttle input, along with eliminating annoying clunking during hard shifts. Features Eliminates the \”CLUNK\” when shifting hard Reduces wheel hop / traction loss Improved 60fts / e.t\’s -1000HP+ and 8sec e.t. torture tested 75A durometer bushings Lifetime Warranty Made in USA Applications 2003-2006 Mitsubishi Evo 8/9 What\’s In The Box? Rear Diff Mount Inserts Warranty ManufacturerLifetimeWarranty