OEM-replacement 2" Shorter VariStruts are a bolt-in suspension-tuning solution for 1979-2004 Mustangs using factory or aftermarket coil-springs. These struts will lower the vehicle ride height 2-3 inches. For use with tubular K-members and large diameter front tires for drag racing. Double-adjustable QuickSet 2 valving lets you quickly adjust the strut’s rate of compression and extension independently with easily accessible sixteen-position knobs.