Please get familiar with the parts included in the K-member package, as listed on the Options tab. Many parts are available in multiple varieties. While it's pretty common to need help from an MM Tech Associate to decide which variety of any particular part is best for your Mustang, when you understand the basic options we can help you better.

Befuddled? Impatient? Hopelessly lost? See the Help Me tab.

Once you have a list of the exact parts you need, either place your order from this page and then type your list of parts into the Comments field located on the checkout page, or place your order by phone.

Keep in mind that customization also means that we can delete items from a K-member package. If you already have some parts from another manufacturer, let us know and we'll check to see if they all play nicely together. On the other hand, if you're ready to load up your Mustang with a complete engineer-designed and track-tested K-member package, we'll hook you up.

The basic kit on this page does not include front struts because most people have already upgraded their Mustang's dampers before they consider more extensive modifications such as a K-member. While the basic K-member package starting price shown does not include struts, adding struts to the package is easy; just tell us what you'd like, or ask us to help you choose what's best for your Mustang. After you place an order, we'll give you a sales quote detailing all the parts you've chosen for your customized K-member package, showing the current pricing.

What's my next step, you ask? Go to the Options tab. Or the Help Me tab.

Customizing your K-member package means choosing the best combination of parts for your Mustang from the available options. Listed here are the options for each part in the package. You may be able to choose the most suitable part after reading through the descriptions in this section, but if you need help, knowing the available options makes your conversation with an MM Tech Associate go more smoothly. Just take it step by step, and all will become clear. Options appear in order of importance. Follow the links to the individual product pages and make note of your choices and questions.

Befuddled? Impatient? Hopelessly lost? See the Help Me tab.

Getting started
The heart of your Mustang's high-performance handling is the combination of springs and dampers. Spring rates should always be chosen first, before dampers, to suit your desired combination of performance and ride quality. In other words, the choice of spring rates guides the damper choice.

Springs
Front coil-over springs are available in a wide range of spring rates. While an MM Tech Associate can help you choose, please read the coil-over section of our Guide to Choosing Spring Rates and Dampers first. The goal is to choose a front spring rate that's at the intersection point of optimum handling and ride quality. Your preferred mix of handling and ride quality, and the choice of front spring rate to achieve that, is the single most important decision to make.

Dampers
If you already have front struts, confirm that your chosen front coil-over spring rate is within the range the struts can control. If you need struts, after picking spring rates the damper choice becomes easier. MM 3rd-Generation struts and shocks are available in 4 different series, with each matching a specific range of spring rates. This is detailed in our handy Guide to Choosing Spring Rates and Dampers.

• MM
• Bilstein
• Koni single-adjustable
• Koni double-adjustable

Coil-over Conversion Kit
The dampers you already have, or choose here, affect the model of the coil-over conversion kit required. MM Front Coil-over Kits fit specific struts; we don't make an ill-fitting universal kit like the others. The brand of strut on your car narrows down the choice of coil-over conversion kit to what fits your strut: Front coil-over kits.

Good work! Now go to the Options 2 tab.

• MMKM-1 fits 1979-1995 Mustangs with an OEM engine type: 5.0L pushrod, 302, 351W, 4.2L, 3.8L, 2.3L.
• MMKM-2.1 fits 1979-1995 Mustangs with an engine swap: 4.6L/5.4L modular, 3.8L V6, 5.0L Coyote (2011-2014), or LSX engine.
• MMKM-3.1 fits 1979-1995 Mustangs swapped with a 4.6L modular engine and a Hellion turbo kit.

Note: An Oil Filter Relocation Kit is required for most applications with an OEM oil cooler. This includes all 4V Cobra 4.6L and some 2V GT 4.6L engines, but not the Coyote engines.

Front Control Arms
Choose one of the many different MM Front Control Arms available.

• The MM Fox length arms slightly increase the track width, moving each front wheel outward 1/4" compared to stock control arms.
• The MM SN95 arms are longer than MM Fox arms and move each front wheel outboard an additional 0.9" over the MM Fox arms. Typically, competitive road racers use these to widen the front track for increased cornering grip. Note that extensive fender modifications are usually required with this option.

• Reverse-Offset: When installed with an MM K-member, this option retains the stock wheel base. Used to keep the tire in the stock fore/aft location, causing no interference between the tire and the front of the fender.
• Non-Offset: When installed with an MM K-member, this option moves the front wheels forward by 3/4". Used to provide increased caster and slightly improved weight distribution. This option has potential for some tire interference (depends on tire size), but can usually be accommodated with minimal modifications that won't affect the exterior paint. We have instructions for the modifications.
• Forward-Offset: When installed with an MM K-member, this option moves the front wheels forward by 1.5". Used to provide significantly increased caster and move the center of gravity rearward, this set-up requires significant fender modifications for tire clearance.
• Drag Race: We omit the front swaybar endlink mount to reduce weight. This option is non-offset. See Non-Offset description above.

• Urethane offers excellent performance and slightly less NVH than Delrin bushings.
• Delrin is recommended for track-driven Mustangs due to much-increased longevity over urethane, along with reduced friction.

• Fox front control arms
• Fox drag race front control arms
• SN95 front control arms

Befuddled? Impatient? Hopelessly lost? See the Help Me tab.

You're almost done! Now go to the Options 3 Tab.

Caster Camber Plates
Front coil-overs require steel caster camber plates with spherical bearings. Your Mustang's chassis year determines which MM Caster Camber Plates you'll need. Choose the main plate finish: either black powdercoating or chrome plating.

Bumpsteer Kit
Choose the bolt-through kit that matches your front control arms (Fox or SN95). If you're swapping an SN95 steering rack into your Fox chassis, read SN95 Steering Rack Upgrade for Fox Mustangs.

Front Swaybar Relocation Kit
The MM Fox Chassis Front Swaybar Relocation Kit (MMFSB-50) is required in all cases except when using the MM Reverse-Offset Front Control Arms. The swaybar relocation kit requires universal front swaybar bushings.

• Which front control arms did you choose? The MM Reverse-Offset Control Arms do NOT require the Front Swaybar Relocation Kit, so use standard replacement swaybar pivot bushings.
• All other Front Control Arms require the MMFSB-50 Front Swaybar Relocation Kit, which in turn requires universal front swaybar bushings.
• After determining the type of bushings you'll need, select the correct bushing size for your swaybar diameter.
• Note that some aftermarket front swaybars include new standard replacement swaybar pivot bushings.

Steering Rack Bushings
No choices to make here; the MM K-member requires using MM's Aluminum Steering Rack Bushings (MMST-6). These let you install the steering rack higher or lower than stock.

Swaybar Endlinks
For standard front swaybars, the MM K-member requires endlinks that are shorter than stock.

• MM Solid Steering Shaft
• MM Front Swaybar Bracket Reinforcements
• MM Strut Tower Brace
• Motor mounts
• Camber gauge
• Bumpsteer gauge

That's it! That's the last decision to make. Now place your order, either by clicking the Add to Cart button and then writing your list of part numbers in the Comments field on the checkout page, or by calling us. When phoning, please have your written list of parts (and any questions) in hand.

Feeling a little overwhelmed by the choices required to set up a K-member package? If you really want the best for your Mustang and the fun of driving a truly awesome car, hang in there. It's really not so difficult. Even if you don't have extensive knowledge of automotive engineering and handling dynamics, have no fear! We're here for you.

First, familiarize yourself with the choices listed on the Options tab. You can probably make many of the required decisions on your own before you contact us just by knowing some basic information about your car. Next, select Maximum Grip Box Setup from the options listed on the Technical Services page and fill out the Maximum Grip Box Setup Form. We do charge for this service, of course, but it's refundable when you buy a K-member package directly from MM.

Once you send us your completed Maximum Grip Box Setup Form we'll lead you through the step-by-step process laid out in that form, answer your questions, and help you decide which parts are best for your Mustang.

If you autocross, open track, race, or would like to retain some aftermarket parts you already have, you'll require a higher level of technical help than most people. Thus, your Maximum Grip Box Setup Form will go to our setup engineer.

We look forward to talking with you. Here's to transforming your Mustang from sloppy to spectacular!

1. Read the Description tab.
2. Read the How to Order tab.
3. Make the choices on the Options tabs to the best of your ability.
4. If you get stuck, deploy the Maximum Grip Box Setup option on the Technical Services page.

What does the K-member package do?
It dramatically transforms your Mustang's front suspension design to a level far beyond what basic bolt-on parts can do. When you want your Mustang to handle well (unlike the average Mustang), you need both lighter weight and a high-performance front suspension design. MM's Engineering Team designed our K-member and related parts to improve the tires' grip on the pavement, which means faster and more stable cornering, which means more fun!

• Includes all the parts you need to install an MM K-member in one money-saving package!
• MM K-member improves your Mustang's handling by altering the suspension geometry. The two sets of pivot holes for mounting the front control arms let you install the FCAs at the best position to optimize the roll center height and improve the camber gain for the ride height you choose.
• Front control arm mounts are shifted 0.75" straight forward. This increases positive caster and moves the center of gravity slightly rearward for improved weight distribution when either Non-offset or Forward-offset front control arms are installed. Moving the center of gravity rearward improves braking, cornering, and acceleration grip as well as ride quality.
• Forward shift of the control arm location increases the Ackerman steering effect, which improves initial corner turn-in and reduces understeer.
• Lighter than stock: installing a complete MM K-member system reduces vehicle weight by nearly 40 lbs.
• Tough enough for street, strip, and road course use.
• MM Front Control Arms use OEM low-friction ball joints for the best performance and ride quality.
• MM Front Control Arms have a true "A" arm design, which is stronger and stiffer than the typical "V" arm.
• MM's bolt-through Bumpsteer Kit is stronger and stiffer than others and offers a greater range of adjustability.
• We make unique MM Coil-over Conversion Kits for specific brands of struts to ensure best fitment. These are not universal kits.
• The MM Front Swaybar Relocation Kit, required with Non-offset and Forward-offset front control arms, moves the swaybar forward to match the shifted position of the front control arms.
• Short swaybar endlinks keep the swaybar correctly aligned with the control arms, which are relocated by the raised pivot points of the MM K-member.

This MM K-member Package for 1979-1993 Mustang includes the following parts and options. For more details and information, see the How to Order tab and use the links below to find individual product pages for the specific features of each part.

• Front coil-over springs
• MM Front Coil-over kit
• MM K-member
• MM Front Control Arms
• MM Caster Camber Plates
• MM Bumpsteer kit
• MM Front Swaybar Relocation Kit
• Front swaybar bushings
• MM Steering Rack Bushings
• Swaybar endlinks

• MM struts and shocks
• Bilstein struts and shocks
• Koni struts and shocks
• MM Steering Shaft
• MM Front Swaybar Bracket Reinforcements
• MM Steering Rack Spacers
• MM Strut Tower Brace
• Motor mounts
• MM Camber gauge
• MM Bumpsteer gauge
• Front Swaybar

How much is weight reduced with a K-member?
Tech: Weight Myths about K-members

2015+ Coyote engine fitment
The 2015+ Mustang GT Coyote engines have Charge Motion Control Valves (CMCV), also known as intake manifold runner controls. The manifold runners have air valves that are moved by vacuum motors located at the back of the intake manifold. The movement is controlled by the ECU. The purpose is to provide better idle control and higher torque at low RPM's. The GT350 intake manifold also has CMCV and the vacuum motors.

The Problem
The CMCV vacuum motors on a 2015+ Coyote engine interfere with the Fox/SN95 firewall when the engine is mounted in the typical location, as dictated by standard 4.6L motor mounts.

Ford Performance no longer sells production 2011-2014 Coyote engines. The only production engines they sell now are 2015+ models.

• Mount the engine 0.75" further forward than the location set by standard 4.6L motor mounts. See "Relocating the engine" below for how to do this.
• Remove the vacuum motors, which will require modifications to the intake manifold to disable the CMCV, along with a custom engine tune.
• Install a 2011-2014 GT intake manifold, which does not have CMCV, and which will require a custom engine tune.
• Install a Boss 302 manifold, which does not have CMCV, and which will also require a custom engine tune.

• Different motor mounts are required. Currently available motor mounts can be modified to move the engine 0.75" forward: 6-504-Bl or MMSMM-2.
• Coming soon! Use our new solid motor mounts that do not require modification to mount the engine forward.
• Coming soon! Use our new urethane mounts that do not require modification to mount the engine forward.

MM K-member changes for engine relocation We changed our MMKM-2.1 K-member to accommodate the Coyote oil pan when the engine is moved forward. The only change is to the design of the brace for the main tube. The new design provides clearance for the relocated oil pan.

• All MMKM-2.1 K-members shipped after August 1, 2018 are of the new design.

The original MM K-member design can be modified to eliminate the interference. Fabrication and welding are required. Contact the MM Tech Department for details.

Fits
1979-1993 Mustangs equipped with certain specific items.

• One of these engines: 5.0L pushrod, 302, 351W, 4.2L, 3.8L, 2.3L, 4.6L/5.4L modular, 3.8L V6, 5.0L Coyote (2011-2014), or LSX engine.
• An Oil Filter Relocation Kit is required for most Ford V8 engines that have an OEM oil cooler. This includes all 4V Cobra 4.6L and some 2V GT 4.6L engines, but not the Coyote engines.
• Coyote swap? See the Coyote Fitment tab.
• Struts suitable for use with a coil-over conversion. If you don't already have them, MM has a variety of high-quality suitable performance strut offerings.
• Your Mustang may require different spindles! Most high-performance struts require spindles from a 1987-1993 V8 Mustang or any 1994-2004 Mustang. Fitting performance struts to a 1979-1986 Mustang, and to a non-V8 1987-1993 Mustang, requires swapping to 1987-1993 V8 spindles or to SN95 spindles and brakes, and using struts from the 1987-1993 V8 group. See our spindle tech section for extensive info about spindles and swap information.

• Manual rack on MM KM-1 and MMKM-1.1 requires MMST-8 Steering Rack Spacers in addition to the MMST-6 Steering Rack Bushings.
• Flaming River power rack on MM KM-1 and MMKM-1.1 requires MMST-8 Steering Rack Spacers in addition to the MMST-6 Steering Rack Bushings.

• These model years have a unique distance between the two holes at each rear lower frame rail mount. You will need either stock nut plates from a 1983-2004 Mustang or four nuts and thick flat washers. Minimal grinding may be necessary on a 1979-1982 Mustang's rear mount to match its wider hole spacing to the narrower spacing of the slots on the MM K-member (matches 1983-2004 Mustangs).

• Mustangs built from 1979 through 10/1/84 have 14mm bolts holding the steering rack to the K-member. You'll need a pair of 1985-2004 Mustang 12mm steering rack mounting bolts and nuts to attach the steering rack to the MM K-member. Caution: Some aftermarket companies sell SAE bolts for this application, but they do NOT fit. You must use the OEM-size 12mm metric hardware.

Befuddled? Impatient? Hopelessly lost? See the Help Me tab.

How do I choose which springs to use?
In general:
Choose springs that provide the handling characteristics and ride quality you want from your Mustang. Here's how to determine that:

• The front spring rate MUST be chosen in conjunction with the rear spring rate, rear spring location, and rear suspension configuration.
• Decide on your performance goal.
• Consider how you'll use your Mustang most of the time, and optimize it for that type of driving.
• Consider what level of ride quality you want. Then decide what (if any) compromises you'll make to achieve your performance goal.

In general, start by selecting a front spring rate that's appropriate for your Mustang's intended use. Then pick the rear spring rate to match, taking into account the rear suspension type (4-link, torque-arm, etc.).

More specifically:
See the MM Guide to Choosing Spring Rates and Dampers.

• Choose your spring rates first. That choice dictates the damper series selection.
• See the MM Guide to Choosing Spring Rates and Dampers.

Befuddled? Impatient? Hopelessly lost? See the Help Me tab.

Please refer to individual product instructions for further information on installing an MM K-member package on your Mustang.

Watch the Engine Power TV episode devoted to installing a Maximum Grip Box.

MM's 1996 Mustang wins at the NMRA SoCal autocross.