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Heavy-Duty Adjustable Mustang Rear Lower Control Arms, 1979-1998
Actual product may differ from photo.
  • Heavy-Duty Adjustable Mustang Rear Lower Control Arms, 1979-1998

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  • Item # MMRLCA-2
  • Manufacturer: Maximum Motorsports


Maximum Motorsports Heavy-Duty series 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. Adjustable-height spring perch allows raising or lowering the rear ride height of your Mustang. Unique MM 3-piece bushing and spherical bearing design easily allows the articulation required for proper handling, and reduces the deflection that can cause wheel hop.

Why would I want to adjust my Mustang's rear ride height?

The easy answer, appearance, is not the only reason. There are a number of other reasons why adjusting ride height is beneficial, such as improved launching.

  • Changing the ride height to make the appearance of your Mustang more to your liking.
  • Compensating for added weight, such as heavy sound system components.
  • Raising the rear end raises the instant center, increasing the anti-squat percentage, and providing a harder hit to the tire on launch.
  • Fine-tuning the ride height (either up or down) to adjust the instant center and therefore the anti-squat percentage, to optimize the launch.
  • To weight jack the car when scaling it, to optimize the diagonal weights for best handling.
  • To raise the right rear corner, increasing the weight on that tire, therefore improving launching by reducing right rear tire spin.

Fits 1979-1998 Mustang with solid rear axle. Includes adjustable-height spring perch and swaybar mount.

If your Mustang...

Why not use the Heavy-Duty control arms in those situations?

For one reason: Those situations may overload the urethane, leading to premature failure of the bushing. When you hit your Mustang's throttle pedal, all of the forces accelerating your car pass from the rear axle housing through the lower control arms and their bushings; that's what moves your Mustang forward. The harder the car accelerates on launch, the greater the forces on the lower control arm bushings. Higher forces lead to a shorter the lifespan of the bushings.

Better by design

  • Stress on the chassis torque-boxes is greatly reduced because the MM design allows proper articulation of the rear suspension.
  • 3-piece urethane bushings allow articulation, while also reducing deflection and damping noise transmission into the cabin.
  • Spherical bearing allows articulation while eliminating deflection at the axle end.
  • Large 2" diameter round steel tube design for highest strength.

Why do I need MM Rear Lower Control Arms?

  • The stock Mustang rear lower control arms are fitted with very large, soft rubber bushings. Those bushings allow the axle to shift fore and aft, as well as skew. Skewing essentially changes the toe of the rear tires. Toe changes cause instability as the rear of the car steers itself in unpredictable directions. The rubber bushings also allow axle wind-up during acceleration, which in turn causes wheel hop.
  • MM Rear Lower Control Arms were designed by our engineering team to minimize fore/aft movement of the axle, while also retaining the suspension's ability to properly articulate. This improves performance without unnecessarily compromising ride quality or handling.
  • Potential torque-box damage is greatly reduced because the MM design allows the suspension to easily articulate.
  • Manufactured by MM in the USA.

Related Products

Maximum Motorsports Heavy-Duty Adjustable-Height Rear Lower Control Arms for 1979-1998 Mustangs


  • Improved traction by eliminating excessive deflection allowed by stock rubber bushings and stamped steel control arm.
  • Greatly reduces occurrence of wheel hop, usually enough to allow removal of quad shocks.
  • Ability to adjust rear ride height allows corner-weight changes, weight-jacking, and fine-tuning ride height to suit your preference.
  • Improved handling, stability, and predictability by more precisely controlling movement of the rear axle.
  • Unique design with 3-piece urethane bushings and spherical bearings allows proper suspension articulation.
  • Reduced possibility of torque-box damage because the MM design allows the suspension to articulate properly.
  • 3-piece urethane bushings at chassis end cause little change in NVH, maintaining excellent street manners.

Maximum Motorsports Heavy-Duty Adjustable-Height Rear Lower Control Arms for 1979-1998 Mustangs


  • Strong and stiff 2” diameter round steel tube construction.
  • 3-piece urethane bushing at chassis end.
  • Large spherical bearing at the axle end.
  • Easy-to-adjust spring perch allows ride height changes without the need to jack the car up and off the ground.
  • CNC-machined receiver tube for the urethane bushings ensures proper fitment, unlike more commonly used saw-cut tubes.
  • Spring perch fits stock springs and aftermarket springs with an isolator.
  • Swaybar mount fits stock and aftermarket swaybars.
  • Durable black powder coated finish.
  • Made by MM in the USA. Beware of poor quality copies made overseas.


  • 1979-1998 Mustang with a solid axle
  • Fox chassis Fairmont, Zephyr, LTD, and Marquis

Do NOT fit

  • 1999-2004 Mustang with a solid axle because of the different mounting bolt size used during those later model years
  • Fox chassis Thunderbird due to differences in control arm length
  • Fox chassis Lincoln Mark VII with airbag suspension due to lack of proper spring perch on chassis

Q: Can I use the MMRLCA-2 in a drag racing application?

A: Yes, but; the heavier the car, and/or the harder it accelerates, the more quickly the urethane bushings will wear out. How quickly the bushings wear depends on the overall weight of the car and the magnitude of the acceleration off of the line (60' time). For cars over 3,200 lb and/or 60' times under 1.7 seconds, we strongly recommend our Extreme-Duty Rear Lower Control Arms.

You can read Maximum Motorsports' detailed MMRLCA-2 Rear Lower Control Arm installation instructions before purchase.