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Turnology drives their S550 after they installed the latest MM Starter Box. Read about the Starter Box and their test drive report.

/DRIVE just released a new video of MM's Mustang in their Tuner car Shootout. We've just posted the parts list and link to the video.

New! MM now offers an adjustable front swaybar for SN95 Mustangs. Currently in stock and ready to ship.

New! MM Starter Box for S550 Mustangs. Includes Koni dampers, MM Caster Camber Plates, choice of Eibach or H&R springs, and Eibach swaybars.

New! Koni struts and shocks are now available for S550 Mustangs. Koni's renowned Sport series single-adjustable dampers will greatly improve the handling your 2015+ Mustang.

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

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$289.97

  • Item # MMRLCA-102
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Maximum Motorsports Sport 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. Unique MM 3-piece bushing at each end allows the articulation required for proper handling, and reduces the deflection that can cause wheel hop. Adjustable-height spring perch allows raising or lowering the rear ride height of your Mustang. Unique MM 3-piece bushing at each end 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 spring perch and swaybar mount.

The brand new Sport series control arms have the same high quality that MM control arms have long been known for, but at a budget price.

How did you lower the price without affecting the quality?
We reduced the number of features. We swapped out the expensive spherical bearings at the axle end of our Heavy-Duty Series in favor of our less-expensive 3-piece urethane bushing design. Otherwise, the Sport Series control arms are identical to the Heavy-Duty Series.

If your Mustang...

Why not use the Sport control arms in those situations?
For one reason: A higher power level will simply reduce the lifespan of the urethane bushings. 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 lifespan of the bushings. For example, with 400 rwhp in a street application the urethane bushings will last for many years. 800 rwhp, slicks, and high-rpm launching at the strip will reduce the lifespan to a single weekend.

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 reducing deflection and damping noise transmission.
  • 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, causing the toe of the rear tires to change. 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 San Luis Obispo, California.

Related Products

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

Benefits

  • 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 allows proper suspension articulation
  • Reduced possibility of torque-box damage because the MM design allows the suspension to articulate properly
  • 3-piece urethane bushings cause little change in NVH, maintaining excellent street manners

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

Features

  • Strong and stiff 2" diameter round steel tube construction
  • 3-piece urethane bushings at both ends
  • Easy-to-adjust spring perch allows ride height changes without the need to jack the car up and off the ground.
  • CNC-machined receiver tubes 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
  • Manufactured by MM in San Luis Obispo, California. Beware of poor quality control arms made overseas

MMRLCA-102 Sport series Rear Lower Control Arms

Fits

  • 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

How can the Sport series have a lower price than the Heavy-Duty series without affecting the quality?
We reduced the number of features. We swapped out the expensive spherical bearings at the axle end of our Heavy-Duty Series in favor of our less-expensive 3-piece urethane bushing design. Otherwise, the Sport Series control arms are identical to the Heavy-Duty Series.

Can I use the MMRLCA-102 in a drag racing application?
Yes, but...
While Sport Series control arms are most suitable for Mustangs having up to 400 rwhp, a higher power level will simply reduce the lifespan of the urethane bushings. For example, with 400 rwhp in a street application the urethane bushings will last for many years. 800 rwhp, slicks, and high-rpm launching at the strip will reduce the lifespan to a single weekend.

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 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-102 Rear Lower Control Arm installation instructions before purchase.