The unique weight jacker adjustable control arms for 1979-04 Mustangs spring cup height adjustment. Allows you to lower the ride height by a full 1-inch or raise it as much as 2 inches. This is an excellent feature for modified cars that need to be raised for tire clearance. Also, great for road race cars requiring adjustability at each corner of the vehicle for weight distribution and balance.

Note: Will not fit 1999-04 Cobra with IRS.