VariStrut's long coil-over conversion is a bolt-in suspension-tuning solution for 1979-2004 Mustangs. These struts will lower the vehicle ride height 0 to 1/2 inches. Can be used with tubular K-members. They feature double-adjustable QuickSet 2 valving to let you quickly adjust the strut’s rate of compression and extension independently, with the ability of adjusting spring preload and easily changing spring rates when tuning the suspension. Coil-over kit includes springs, upper and lower spring seats, and spanner wrench.