MM News

New! MM Technical Services: MM’s Engineering Team will provide setup recommendations specifically tailored for your Mustang. Get help choosing options for a Maximum Grip Box, deciding on coil-over spring rates, selecting a brake master cylinder, and advice on converting your Fox to Hydroboost.

New! Swapping a Coyote into a Fox Mustang? MM's Hydroboost Conversion Kits allow easy installation of a 1996-2004 Mustang Hydroboost power brake assist unit into a 1979-1993 Mustang.

New! Swapping an IRS into your Fox Mustang? MM makes it easier with a brake line kit made just for this conversion. Bolts-in, with no cutting or flaring of brake lines. Designed to fit standard IRS brake hoses.

New! MM now offers a tool for the giant nut securing a Mustang Hydroboost. This MM socket fits the 1-7/8" nut holding the Hydroboost to the firewall mount. Required when changing a Hydroboost unit.

New! MM's billet aluminum Pedal Box Spacer for Fox Mustangs. Replace the breakage-prone OEM plastic spacer when converting to manual brakes or Hydroboost.

Canadians! Please read the latest about ordering from Canada/shipping to Canada.

We've posted the parts list and link to the video of MM's Mustang in /DRIVE Tuner car Shootout

MM Front Control Arms, 1979-93 Mustang
Actual product may differ from photo.
  • MM Front Control Arms, 1979-93 Mustang
  • Urethane Bushing FCA
  • Delrin Bushing FCA

click on thumbnail to zoom


  • Item # MMFCA-FOX
  • Manufacturer: Maximum Motorsports

Select Option(s):

Pivot Bushing Material

Ball Joint Offset



Maximum Motorsports Front Control Arms set the standard for quality and performance. Give your Mustang the #MMAdvantage.

3 versions and 2 options let you choose what's best for your Mustang!

Better by design
  • Reduce unsprung weight with these lighter-than-stock control arms.
  • Lower overall weight by nearly 40 lbs. with the combination of MM Control Arms, MM K-member, and an MM Coil-over Conversion Kit.
  • Improve steering response and enjoy better control of dynamic alignment through less deflection with urethane or Delrin pivot bushings (your choice).
  • Increase tire clearance for a tighter turning radius.
  • Latest-version OEM low-friction ball joints improve performance and ride quality over stock Fox and aftermarket products.
  • True "A" arm design increases rigidity and equalizes the loads into the K-member compared to standard "V" arms.
  • Because of gusseting in critical areas, MM Control Arms will plastically deform in a severe accident rather than fracture, absorbing more energy.
  • Choose from several versions to meet your fitment requirements and performance goals. Some can be used with the stock Ford K-member, while others require a Maximum Motorsports Tubular K-member.
  • Requires a front coil-over conversion and caster/camber plates; does NOT fit stock-location springs.
  • 3 versions, each with its own fitment requirements. Read the descriptions carefully before choosing!
  • An MM Front Swaybar Relocation Kit may be required, depending on the combination of control arm version and K-member. See the Front Swaybar Relocation Kit page for details.

1979-93 Fox Mustang Control Arm Choices
There are 3 basic versions of MM Front Control Arms available for Fox Mustangs, plus our specialized Drag Race front control arms. Additionally, the MM FCAs designed for the 1994-04 SN95 Mustang may also be used on a Fox Mustang. MM's SN95 control arms push each front wheel 0.9" further outboard per side than the wheel location set by the MM Fox Mustang FCAs. Installing SN95 FCAs usually requires significant fender modifications; how extensive they are depends upon the wheel offset. The MM SN95 FCAs have an additional swaybar endlink mounting hole, located for use with a Fox chassis front swaybar.

The 3 Versions
The difference between the versions is the ball joint offset in the fore/aft direction. By that we mean the fore/aft location of the ball joint, relative to the rear axle. Moving the ball joint away from the stock fore/aft location affects both wheelbase and caster, as well as tire clearance. Which is best for your Mustang depends both on your combination of parts and your performance goals. If you need help making the decision, contact us.

  • Installed with an MM Tubular K-member: Retains the stock wheel-base.
  • Not for use with a stock Ford K-member because it would move the tire rearward from the stock location.
  • Primary use: with an MM K-member to keep the tire in the stock fore/aft location, therefore not causing interference between the tire and the front of the fender.
  • Installed with an MM Tubular K-member: Moves front wheels forward by 3/4".
  • Installed with a stock Ford K-member: retains the stock wheelbase.
  • Primary uses: with Ford K-member to avoid tire interference. With MM K-member to provide increased caster with a potential for some tire interference (depends on tire size), usually correctable with minimal modifications.
  • Installed with an MM Tubular K-member: Moves front wheels forward by 1.5".
  • Installed with a stock Ford K-member: Moves front wheels forward by 3/4".
  • Primary uses: with Ford K-member to provide increased caster. Has potential for some tire interference (depends on tire size and wheel offset), usually correctable with minimal modifications. With MM K-member to provide significantly increased caster and move center of gravity slightly rearward, with significant fender modifications required for tire clearance.
Select Bushing Material
  • Urethane: Intended for street use. These bushings will make your Mustang far more responsive to steering inputs because of reduced deflection, while keeping it quiet and comfortable.
  • Delrin: Intended for racing. These bushings have zero deflection and a longer life expectancy in racing applications than urethane. Expect an increase in ride harshness and noise transmission compared to urethane.

Select the Ball Joint Offset
Choose one of the 3 available offsets. Be sure you are familiar with the effects of your choice; read the descriptions of each. If you have questions, contact us.

  • Reduces unsprung weight.
  • Reduces overall weight by nearly 40 lbs. with the combination of MM Control arms, MM K-member, and MM Coil-over Conversion Kit.
  • Improves steering response and controls dynamic alignment better.
  • Increases tire clearance, allowing a smaller turning radius.
  • Improves performance and ride quality by using low-friction ball joints instead of stock Fox ball joints.
  • Increases rigidity and equalizes the loads into the K-member by being a true "A" arm design.
  • Will plastically deform in a severe accident rather than fracture, absorbing more energy.
  • 3 versions available to meet your fitment requirements and performance goals.
  • Light-weight tubular construction.
  • Pivot bushings made of either urethane or Delrin; your choice.
  • Placement of rearward control arm tube increases tire clearance.
  • Assembled with the latest-version OEM low-friction ball joint, with an expected lifespan of over 200,000 miles.
  • True "A" arm design provides greater rigidity than the standard "V" arms.
  • Gussets in critical areas prevent fracturing in a severe accident, instead aiding plastic deformation to absorb energy.
  • 3 different versions allow placing the tire in the optimum fore/aft location.
  • Stock 1979-1993 Mustang K-members (some k-members require minor modification)
  • Stock 1994-2004 Mustang K-members
  • Most aftermarket K-members for 1979-2004 Mustangs
  • Stock 1983-1988 Thunderbird K-members
  • Some k-members may require modification.
Required modification to some stock 1979-1993 k-members
  • 1987-1993 V8-equipped Mustangs do not require modification because they have a wider front track than all other 1979-1993 Mustangs. The track width is greater because the front control arm mounting holes are located further outboard on these k-members.
  • All other 1979-1993 Mustangs require a minor modification to the k-member because their narrower track width causes interference between part of the k-member and the crossbar of the MM front control arms.

See the MM Front Control Arm installation instructions for details on the slight modification required to fit MM control arms to a narrow-track k-member.

Aftermarket K-members
Be alert to possible incompatibility with some aftermarket K-members due to the 3 different offsets available for MM Front Control Arms. See "The 3 Versions" section on the Description tab, and choose the appropriate MM control arm set for your K-member.

Will MM Front Control Arms fit other K-member brands?
All MM Front Control Arms designed for Fox and SN95 Mustangs have the stock bushing length and fore/aft spacing. Therefore, they fit all stock Fox and SN95 K-members, as well as aftermarket K-members that correctly duplicate the stock bushing geometry and spacing. Be alert: MM K-members are not the only ones that move the front control arm mounting points in the fore/aft direction from the stock location.

Can I install a stock location spring on an MM Front Control Arm?
NO! The MM Front Control Arms are lighter than stock Ford control arms because they are designed for use with coil-overs. With coil-overs there is no need for the arm to withstand the large bending load caused by a spring mounted in the middle of the control arm, which allows the arm to be made much lighter.

Can I install aftermarket ball joints in the MM Front Control Arms? Yes. They should be pressed in, using Loctite's green bearing and sleeve retainer. Do not weld the ball joints in place.

We welcome your questions about this product. If you have a question, please use our Contact Us page to email your question. We'll answer your question by return email, and also consider it for possible addition to this FAQ section.

You can read Maximum Motorsports' highly detailed MMFCA Front Control Arm installation instructions before purchase.