This Extended Leaf Spring Shackle Kit is approximately 1" longer than the standard stock replacement Featuring premium-quality stainless steel construction, this kit is incredibly easy to install on Mustang GTs with a dual exhaust design. The extended size makes these aftermarket shackles easier to install than stock shackles. This shackle kit is comprised of only high-quality products and will have unmatched durability for the coming years. The kit includes extended-length shackle plates, premium 9/16" rubber bushings, and all necessary installation hardware.