ST Suspensions adjustable lowering springs for 2015 and newer Ford Mustang (S-550) without electronic suspension convert the stock suspension into a height-adjustable system using a threaded sleeve. They allow height adjustment similar to coilovers while retaining original dampers, use chrome-silicon steel spring construction and vehicle-specific spring rates, and are intended to lower the center of gravity and improve handling characteristics.
ST Adjustable Lowering Springs 2015+ Ford Mustang (S-550) w/o Electronic Suspension