The Kartboy Rear Differential Outrigger Bushings for the 02-07 WRX & STi will eliminate alot of excess play associated with the soft stock rear differential bushings under hard acceleration and on/off throttle loads. Most of the infamous subaru "clunk" will also be removed after installation of these kartboy bushings. Constructed of durable urethane and made in the USA.
These bushings are just like the (hard) black ones but are made out of slightly softer urethane. The softer urethane will transmit less NVH (cabin noise/vibration) at the expense of lesser performance compared to the black bushings. However, these are still a significant upgrade over stock.
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