FAQs & Tech Tips

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NASA Racers! MM will support NASA road racers with $1,000 contingency prizes for the American Iron, American Iron Extreme, and Spec Iron at the 2019 National Champions. You must register to be eligible.

New! Read the article Maximum Motorsports Tames Fox & SN95 Mustang Rear Suspensions on FordMuscle.com.

MRT Exhaust! MM now offers premium MRT cat-back exhaust systems for 1996-2004 Mustangs.

New! for Street & Strip Mustangs! Big-bore rear wheel cylinders for 1979-1993 Mustang with 9" drum brakes. Improves braking when running big rear tires and front skinnies, and/or different OEM front brakes.

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'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

Coil-Over Package for Koni dampers, 1994-04 Mustang
Actual product may differ from photo.


  • Item # COP-52
  • Manufacturer: Maximum Motorsports

Select Option(s):

CC Main Plate Finish

Strut and Shock options

Add second rear lower shock mount?



Complete coil-over conversion package for 1994-2004 Solid Axle Mustang. Includes everything needed for converting your Mustang from conventional springs to a coil-over suspension.

Choose your Options

  • Once buttons have been selected in each of the three option areas above, the part number and price will reflect the package selected.
  • Three buttons must be selected before clicking the Add To Cart button.

This coil-over package includes these parts:

Enter your choice of spring rates into the "Comments" field at checkout.

Related Products

Benefits of a coil-over conversion:

  • Improved performance without sacrificing ride quality.
  • Allows a large increase in the wheel rate, which reduces body roll when cornering, as well as brake dive, without adversely affecting ride quality.
  • Eliminates friction in the control arm pivots, which greatly improves ride quality.
  • Provides the means to easily adjust ride height.
  • Provides the means to easily adjust corner weights.
  • Springs are available in a very wide range of rates, suitable for everything from street cruising to road racing.
  • Future ease of swapping your springs for ones with a different rate.

  • Everything you need for a coil-over conversion is in one money-saving package.
  • No need to piece together a kit from multiple sources.


These MM-designed and manufactured items; see the individual product pages for each item for more details:

Top-quality springs:

Top-quality performance dampers, listed above in the options section.


  • 1994-2004 Mustang chassis
  • All 1994-2004 Mustang spindles

Does NOT fit

  • 1979-1993 Mustang
  • Thunderbird
  • Lincoln

I have a Cobra IRS in my Fox Mustang; which package do I need?

We do not have packages listed for this, but we will create a custom package just for you; contact us. For the rear it will have the parts for the Cobra IRS, while the front will have parts for your model year Mustang.

Do front coil-overs cause noise?

Not when properly designed and installed. But just as happens with many performance modifications, they will more readily transmit noise from other sources into the vehicle cabin. More noise transmission happens because the stock rubber upper strut mount is replaced by the spherical bearing of the caster camber plate. Generally, all that is heard is a little more road noise from the tires. However, if something is amiss, in the brakes or suspension, there may be more significant noise transmitted.

Do rear coil-overs cause noise?

Sometimes. The Mustang solid axle rear suspension will allow enough articulation in some driving situations, typically when entering a steep driveway at an angle, that the shock will extend into droop far enough that the spring will lose tension. The loss of spring tension will allow the spring to come loose from the upper perch; the spring may then rub on the threaded sleeve as it slips back into place when the suspension settles down. Installing longer springs will not change this situation.

To avoid any chance of this situation and resulting noise, when using low rate front coil-over springs, stick with stock-location rear springs, as they will always have tension when the suspension droops. Low front coil-over spring rates with a matching stock-location rear spring provides good ride quality and balanced handling. Higher front spring rates, typical of high performance street driving or open-tracking, will require a rear coil-over conversion to achieve the proper handling balance.

There is rarely an issue with the front coil-over springs losing tension, as the Mustang front suspension is independent. Similarly, the Cobra IRS rarely exhibits this issue.

Do I need an alignment after changing ride height?

Yes. Any change in ride height will cause the front camber to change. Any camber change will cause the toe setting to change. While a small change in ride height may not cause a significant enough of a change in camber to require resetting the camber, that camber change will cause the toe setting to change. If toe is incorrect by even a very small amount it will cause uneven tire wear.

While there are no instructions for the entire package, installation instructions for the individual parts in this package can be found here.