These solid polyurethane Whiteline bushings are much harder compared to the OEM units. By replacing them with these harder Whiteline units you are able to get rid of the unwanted slop and flexing of the stock units, allow 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.