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. •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 TECH TIP: Installation is pretty easy. There are 2 bolts to the side supports that hold the diff. you unbolt them and pressout the rubber and slide in the urethane. Similar to engine mount inserts. Installation can be done on the floor with no lift. Fits: Mitsubishi Lancer Evolution VIII, IX 2003-2007 Part # TS-EV-007