Unity automotive has over 50 years of experience manufacturing parts in the aftermarket automotive industry. The company offers superior quality, specializing in making rock solid auto parts that withstand the test of time. With a true understanding of their marketplace they have become the industry leader in innovation of aftermarket suspension. Unity automotive delivers top of the line quality suspension parts made to insure a trouble-free installation and long-lasting reliability. The Replacement Shock absorber line offers a twin tube gas charged shock to be used as a direct replacement for your failing OE shocks.This Product Fits: 2008-2014 Ford E-150; 2009-2014 Ford E-250; 2008-2019 E-350 Super Duty; 2008-2019 E-450; 2008-2019 F-250 Super Duty RWD; 2008-2019 Ford F-350 Super Duty RWD; 2017 Ford F-450 Super Duty NOTE: Fits F-350 Super Duty with Dual Rear Wheels, Excludes E-350 Motorhome, and F-250 Super Duty with Off Road Suspension