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.

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

MM Full Length Subframe Connectors, 1979-04, powdercoated
Actual product may differ from photo.
  • MM Full Length Subframe Connectors, 1979-04, powdercoated

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$184.97

  • Item # MMFL-5PC
  • Manufacturer: Maximum Motorsports
 

 

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Maximum Motorsports XL Series Full Length Subframe Connectors, 1979-04 Mustang hardtop and convertible, black powdercoated finish

  • MM Full-length Subframe Connectors should be the first modification to your Mustang.
  • MM Full-length Subframe Connectors stiffen your Mustang's chassis more than any other under-car subframe connector.
  • A stiff chassis improves ride quality and performance.
  • A stiff chassis enables the springs and shocks to function properly.
  • The longest subframe connector available, at 65".
  • One-piece reinforcements for the seat mounts simplify installation.
  • Durable black powdercoated finish

NOTE: Full Length Subframe Connectors always ship separately.

For more details and technical information, scrolldown.

  • Welding required for installation.
  • MM XL Series subframe connectors are 95% stiffer than standard subframe connectors.
  • MM subframe connectors are strong enough that you can lift the car by placing a jack anywhere along the length of the connector tube!
  • Extends from the rear lower control arm attachment point on the rear subframe all the way up to the firewall, providing substantially more weld area than other connectors.
  • Made of 1.5" x 2" x .083" wall thickness rectangular tubing.
  • MM XL Series subframe connectors do not hang any lower than the lowest part of the car-the exhaust system.
  • MM created the first Full-length Subframe Connectors; beware of imitators who attempt to copy the original innovative design.

For even more technical information, please click the Tech button below.

Tech Info

View Maximum Motorsports' highly detailed Full Length Subframe Connector installation instructions to help you determine what is required for installation before your purchase your connectors.