The Detroit Speed Rear Coilover Conversion Kit allows the latest in coilover spring/shock technology to be bolted onto any Fox Body Mustang, bringing your classic's handling and ride into the 21st Century with our "Detroit Tuned" valving. The springs are removed from the lower control arms and shock mounts are relocated into the frame rail for maximum strength and wheel/tire clearance. Once the coilover conversion is complete, Detroit Speed Mini-Tubs may be installed in the car at any time. The Single Adjustable Shock option includes all the features of the non-adjustable shock with "Detroit Tuned" valving plus installed rebound adjustment with the simple turn of a knob; all while providing excellent ride quality on the street.