ST Suspension Ford Mustang S550 GT Coupe 2015 model ST-X. ST Suspension is a high quality brand from KW Suspension. The ST-X kit features adjustable rebound damping and is height adjustable via threaded shock bodies, or where a threaded shock isn't possible it is height adjustable via shocks and a separate threaded spring platform. This kit will allow lowering of 30-50mm on the front axle and 20-40mm on the rear axle allowing you to get your ride height just where you want it. Price is for a full set. Image for illustration purposes only. Current lead time is around 4 weeks but please check with us when ordering as lead times may change.