Maximum Motorsports Extreme-Duty series Adjustable Rear Lower Control Arms for the 1979-1998 Mustang improve traction and handling by reducing the unwanted deflection allowed by the stock soft rubber bushings and flexible stamped steel control arm. Spherical bearings at both ends of this control arm eliminate the deflection that can cause wheel hop, yet also allow the articulation required for proper handling. Adjustable ride height lets you change your Mustang's instant center location to tune the anti-squat percentage for optimum traction. Fits 1979-1998 Mustang with solid rear axle. Includes spring perch and swaybar mount.