Fits 1979 - 2004 Ford Mustang (Does not fit 1999 - 2004 Cobras with IRS). This kit will stiffen your chassis to improve handling and reduce wheel hop during straight-line acceleration. Fabricated from high-strength steel, this kit is also hard powder coated to protect from chips and corrosion. The control arms come pre-loaded with Delrin bushings which are stronger and more durable than the OEM rubber bushings. This is a bolt-on kit that does not require any fabrication to install. This kit includes 4x Tubular Rear Control Arms, Installation Hardware, and Detailed instructions.