LPI Racing
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Ford Mustang > Suspension > Chassis Braces


Maximum Motorsports

Maximum Motorsports
Chassis Brace Packages K-Member Braces Subframe Connectors
Strut Tower Braces Subframe Reinforcements

Chassis Stiffening
This is the first area we recommend you upgrade when you begin modifying your Mustang. A sturdy chassis is critical to provide a good platform for future suspension improvements to your car.




Maximum Motorsports

MM's Chassis Brace Packages include your choice of subframe connectors, Standard or XL series (bare steel or powdercoated), four point K-Member brace, and a strut tower brace. There are many different packages available to cover the different year models of Mustang. Each part in the package will be correct for the listed year models and listed features, regardless of the photos showing similar packages for different vehicles.
MM Chassis Brace Packages Include:
MM Strut Tower Brace*
MM 4-Point K-Member Brace**
MM Subframe Connectors (Your Choice)
Maximum Motorsports Chassis Brace Package
This photo shows standard length subframe connectors. This photo shows full length subframe connectors.
*Chrome: Available with a triple-plated chrome finish for an additional $120.
**Automatic Transmissions: The 4-Point K-Member Brace may have a slight interference with the automatic transmission's cooler lines. These lines can be relocated slightly.
-Call for information on possible clearance problems with the K-Member braces and long tube headers.
Chassis Brace Packages Year Subframe Connectors Subframe Finish P/N (Call for Price)
Mustang HT, Carbureted 79-85 Standard length bare steel MMCBP-1
Mustang HT, Carbureted 79-85 Standard length powdercoated MMCBP-2
Mustang HT, Carbureted 79-85 Full length bare steel MMCBP-3
Mustang HT, Carbureted 79-85 Full length powdercoated MMCBP-4
Mustang HT, Fuel Injected 86-93 Standard length bare steel MMCBP-5
Mustang HT, Fuel Injected 86-93 Standard length powdercoated MMCBP-6
Mustang HT, Fuel Injected 86-93 Full length bare steel MMCBP-7
Mustang HT, Fuel Injected 86-93 Full length powdercoated MMCBP-8
Mustang Convertible, Carbureted 83-85 Standard length bare steel MMCBP-9
Mustang Convertible, Carbureted 83-85 Standard length powdercoated MMCBP-10
Mustang Convertible, Carbureted 83-85 Full length bare steel MMCBP-11
Mustang Convertible, Carbureted 83-85 Full length powdercoated MMCBP-12
Mustang Convertible, Fuel Injected 86-93 Standard length bare steel MMCBP-13
Mustang Convertible, Fuel Injected 86-93 Standard length powdercoated MMCBP-14
Mustang Convertible, Fuel Injected 86-93 Full length bare steel MMCBP-15
Mustang Convertible, Fuel Injected 86-93 Full length powdercoated MMCBP-16
Mustang HT 94-95 Standard length bare steel MMCBP-25
Mustang HT 94-95 Standard length powdercoated MMCBP-26
Mustang HT 94-95 Full length bare steel MMCBP-27
Mustang HT 94-95 Full length powdercoated MMCBP-28
Mustang GT HT 96-97 Standard length bare steel MMCBP-29
Mustang GT HT 96-97 Standard length powdercoated MMCBP-30
Mustang GT HT 96-97 Full length bare steel MMCBP-31
Mustang GT HT 96-97 Full length powdercoated MMCBP-32
Mustang Cobra HT 96-97 Full length bare steel MMCBP-35
Mustang Cobra HT 96-97 Full length powdercoated MMCBP-36
Mustang Cobra HT 99-02 Standard length bare steel MMCBP-37
Mustang Cobra HT 99-02 Standard length powdercoated MMCBP-38
Mustang Cobra HT 99-02 Full length bare steel MMCBP-39
Mustang Cobra HT 99-02 Full length powdercoated MMCBP-40
Mustang GT HT 98-04 Standard length bare steel MMCBP-41
Mustang GT HT 98-04 Standard length powdercoated MMCBP-42
Mustang GT HT 98-04 Full length bare steel MMCBP-43
Mustang GT HT 98-04 Full length powdercoated MMCBP-44
Mustang Cobra HT 1998 Full length bare steel MMCBP-45
Mustang Cobra HT 1998 Full length powdercoated MMCBP-46
Mustang Cobra HT 03-04 Standard length bare steel MMCBP-47
Mustang Cobra HT 03-04 Standard length powdercoated MMCBP-48
Mustang Cobra HT 03-04 Full length bare steel MMCBP-49
Mustang Cobra HT 03-04 Full length powdercoated MMCBP-50

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Maximum Motorsports

K-Member Braces
The Mustang's K-member is the mounting point for the front control arms, the steering rack, and the engine. It is a critical structural member because it carries the loads into the chassis from the front suspension.
While the heavy stock K-member is a rather stout item, it still is not capable of handling all of the suspension forces directed into it from the front control arms. During cornering, the forces from the control arms cause the K-member to deflect, resulting in alignment changes.
The MM 4-Point K-Member brace eliminates K-member flexing by bracing across the K-member, from one side of it to the other, as well as connecting to the rear most chassis mounting points of the K-member. The position of the MM brace provides a direct load path into the chassis for the cornering loads from the control arms. This bracing is done at the rear of the K-member (the area of greatest deflection).
In 1994 Ford made a 2-point K-member brace standard equipment on the 5.0L Mustang. All V-8 Mustangs continued to come with 2-point braces through 2004. It seems that Ford agrees with us; the Mustang needs a K-member brace!
Four-Point Braces
* The front of the MM brace mounts to the bottom of the K-member. The rearward points of the brace mount at the K-Member-to-chassis mounting points.
* The MM K-Member Brace's design includes a structural steel web. This splits the suspension loads. Part of the load goes into the unibody at the rearward K-member to chassis mounting points, and part goes straight across the K-member to the opposite side.
* The mounting bolts for the brace attach through a structural tube. Unlike commonly used flat tabs, the suspension loads pass into the MM brace without deflecting the mounts.
* Note: 4-Point braces will not clear long-tube headers. MMKB2-2 will clear most long-tube headers.
Maximum Motorsports Four Point K-Member Brace
MMKB4-3 & MMKB4-4
MMKB4-1 & MMKB4-2
MM Tubular K-Members

4-Point K-Member Brace Year Description P/N (Call for Price)
Mustang, 5.0L except Convertible 79-93 4-Point K-Member Brace MMKB4-1
Mustang, 5.0L Convertible 83-93 4-Point K-Member Brace MMKB4-2
Mustang, 5.0L 94-95 4-Point K-Member Brace MMKB4-3
Mustang, 4.6L HT 96-04 4-Point K-Member Brace MMKB4-4

Two-Point Braces
MMKB2-2 will clear most long-tube headers.
On 1979-93 Mustangs, the 4-point K-Member Brace (MMKB4-1) and 2-point brace (MMKB2-1) may have slight interference with automatic transmission cooler lines. These lines can simply be relocated slightly, or use 2-Point K-Member Brace MMKB2-2.
Maximum Motorsports Two Point K-Member Brace
MMKB2-1 MMKB2-2
2-Point K-Member Brace Year Description P/N (Call for Price)
Mustang 79-93 2-Point K-Member Brace MMKB2-1
Mustang, Auto Trans. 79-93 2-Point K-Member Brace MMKB2-2

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Maximum Motorsports

Strut-Tower Braces

The MM Strut Tower Brace will make your car's handling more stable and predictable by stiffening the front portion of the chassis. MM's unique strut tower brace design provides a load path between the two individual strut towers and between each strut tower and the firewall. This keeps the strut towers from moving relative to each other. Flexing of the strut towers, both fore/aft and side-to-side, causes unpredictable handling because the flexing causes alignment changes and a lack of roll coupling. A MM Strut Tower Brace will prevent the alignment from changing during hard braking and cornering. An additional benefit of increased chassis rigidity from the strut tower brace is a reduction in firewall and dashboard vibration, metal fatigue, and noise. Ford finally recognized the benefits and started installing strut tower braces beginning with the 1994 models.
Maximum Motorsports Strut Tower Brace Unique Features of Maximum Motorsports Strut Tower Braces:

* MM's main tubes are made of rigid 1-1/4" diameter DOM seamless tubing. This tubing is twice as stiff as the generally used 1" tubing, and DOM seamless tubing is 30% stiffer than the more commonly used ERW, seamed tubing.
* The firewall mounting point for the rear support tubes is the pinchweld that runs the width of the firewall. When attaching something to sheet metal, the best mounting point is at a joint or a corner, such as the pinchweld on the Mustang's firewall. The pinchweld on the firewall was formed by folding together three pieces of metal (the upper firewall, the lower firewall, and the floor of the cowl), and then welding them together. This provides an extremely stiff mounting point for our Strut Tower Brace.
* Nearly all other strut tower braces attach to the center of the firewall, its weakest and most flexible portion. Attaching there adds little stiffness, and leads to cracking and tearing of the firewall.
* On 5.0L engines, MM's Strut Tower Brace allows the use of all popular intake manifolds because no part of the brace passes over the top of the intake manifold.
* MM Strut Tower Braces are designed to allow the use of MM Caster/Camber plates.
* MM Strut Tower Braces are attached with high quality grade 5 hardware.
Maximum Motorsports Strut Tower Brace Installed
Strut Tower Braces Year Description Finish P/N (Call for Price)
Mustang, Carbureted 79-85 Strut Tower Brace Powdercoated Black MMSTB-2
Mustang, Fuel Injected 86-93 Strut Tower Brace Powdercoated Black MMSTB-1
Mustang GT & Cobra 94-95 Strut Tower Brace Powdercoated Black MMSTB-3
Mustang Cobra (also fits 94 - 97 V6) 96-97 Strut Tower Brace Powdercoated Black MMSTB-4.1
Mustang GT 96-97 Strut Tower Brace Powdercoated Black MMSTB-5.1
Mustang Cobra 1998 Strut Tower Brace Powdercoated Black MMSTB-4
Mustang GT 98-04 Strut Tower Brace Powdercoated Black MMSTB-5
Mustang Cobra (also fits '01 Bulit) 99-02 Strut Tower Brace Powdercoated Black MMSTB-6
Mustang Cobra 03-04 Strut Tower Brace Powdercoated Black MMSTB-7
Mustang Cobra (Kenne-Bell or Whipple SC) 03-04 Strut Tower Brace MMSTB-8

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Maximum Motorsports

Subframe Connectors
All suspension loads go through the front and rear subframes and into the central unibody structure. The Mustang unibody bends and flexes because the front and rear subframes of the car are connected by the unsupported and flexible center portion of the floor pan.
Maximum Motorsports subframe connectors are welded to the bottom of the unibody, connecting the front and rear subframes and supplying more structure than is provided by the floor pan. This increased structure reduces the amount of bending and twisting in the chassis.
Maximum Motorsports Standard Subframe Connectors Standard Subframe Connectors
MM subframe connectors securely weld to the front and rear subframes of your Mustang. (Bolt-on connectors do not work because the bolts cannot be properly tightened due to the lack of structure in the car’s subframes.)
MM's standard subframe connectors are made of 1" x 2" rectangular tubing, with .120" wall thickness - over 40% stiffer than other well-known brands. Rectangular tubing provides more weld area, as well as increased ground clearance, compared to round tubing.
MM's seal the tubing by welding on end caps to prevent them from rusting from the inside out.
The MM connectors have a cross brace used to reinforce the crack-prone area of the floor pan where the seats attach.
MM connectors are custom shaped to hug the floor pan of your Mustang for maximum ground clearance.
Standard Subframe Connectors Year Description Finish P/N (Call for Price)
Mustang 79-93 Standard Subframe Connectors Bare MMSF-1B
Mustang 79-93 Standard Subframe Connectors Black Powdercoated MMSF-1PC
Mustang 94-04 Standard Subframe Connectors Bare MMSF-3B
Mustang 94-04 Standard Subframe Connectors Black Powdercoated MMSF-3PC

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Maximum Motorsports

MM Subframe Reinforcements: MM designed these reinforcements to allow the installation of MM's Torque-arms on cars that already had Kenny Brown subframe connectors. Installation more than doubles the strength of KB connectors, allowing the installation of a Torque-arm. Welding required.

MM Subframe Reinforcements Description P/N (Call for Price)
Mustang MM Subframe Reinforcements for Kenny Brown Subs. MMSFA-1

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LPI Racing
2021 Las Positas Court #145, Livermore CA 94551
Phone: (925)292-5522
E-mail:
Sales@LPIRacing.com

See our new site at LPIRacing.com