Sub-frame Mount BushingKitby Whiteline The Whiteline kit replaces the bushings in the rear subframe to dramatically reduce rear cross member misalignment & movement which allows a more positive feel from the rear end during cornering. Recommended for motorsport applications. Applications 2011-2014 Subaru WRX 2011-2014 Subaru STI What\’s in the box? 2 Type 20 – 40.9mm Bushings 2 Type 20 – 41.1mm Bushings 4 Type 19 – 40.7mm Bushings Warranty MFGR. Limited Warranty