These bolts lock out the rear diff subframe bushings to maintain alignment under extreme conditions. This kit addresses the banging associated with hard shifting. Fits all 2002-2007 WRX, WRX STi, Forester, and many Legacy models.
NOTE: Whiteline advises that this item WILL increase noise/vibration into the car. (That makes sense, since this kit basically bypasses the factory bushings.) Use at your own risk.