Get your Mustang S550 low without sacrificing ride quality. Air Lift Performance air spring suspension gives you maximum drop with superior handling, a sharp steering response, and a comfortable ride. With a huge range of damping adjustment and lightweight components (lighter than coilovers), you can't choose a better lowering kit for your ride. Add the versatility of the monotube dampersfor the best performance on both the track and the streetand Air Life Performance is a no-brainer for your Mustang. In the rear, we have replaced the coil spring with our compact, double-bellows air spring to match the ride quality with that of the front. We also replace the shocks with our own 30-level damping adjustable monotube shocks for the ultimate in handling performance. This kit looks almost as sharp as it performs, with bright red accents on a black chromed shock body with gloss black powder-coated spring brackets. As you can see, we have included everything to allow you to drop the rear of your Mustang 5.1'' from stock! As the leader in air suspension products for over 60 years, Air Lift is committed to delivering quality parts that last. To ensure longevity for the customer, the key suspension components have been track-proven and tested on a durability rig for over one million cycles, which equates to 100,000 miles. With a one-year, unlimited-mileage warrantynot to mention the Air Lift Performance reputation for great customer service and technical support you can purchase this kit with peace of mind. PartNumber : alf78621 Description : AIR LIFT PERFORMANCE REAR KIT Title : Air Lift Performance Rear Kit California Proposition 65 : Yes WARNING CA Proposition 65 : Yes Features : Adjustable lower perches allow ride height to be changed independently of pressure, so user can dial in preferred pressure/ride height combination. WARNING CA Proposition 65 Message : California Warning: Cancer and Reproductive Harm û www.P65Warnings.ca.gov 2015-2018 Ford Mustang EcoBoost L4.2300cc Suspension::Air Suspension Kits 2015-2018 Ford Mustang EcoBoost Premium L4.2300cc Suspension::Air Suspension Kits 2015-2018 Ford Mustang GT V8.4951cc Suspension::Air Suspension Kits 2015 Ford Mustang GT 50 Years Limited Edition V8.4951cc Suspension::Air Suspension Kits 2015-2018 Ford Mustang GT Premium V8.4951cc Suspension::Air Suspension Kits 2016-2018 Ford Mustang Shelby GT350 V8.5163cc Suspension::Air Suspension Kits 2016-2018 Ford Mustang Shelby GT350R V8.5163cc Suspension::Air Suspension Kits 2015-2017 Ford Mustang V6 V6.3726cc Suspension::Air Suspension Kits