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  1. UPR 79-04 Mustang Max-Cross Subframe Connectors
    $59.99

    UPR's Extreme Double-Cross Sub-Frame Connectors Improve handling, feel, weight transfer and extend the life of your vehicle by reducing chassis flex and strengthening the flimsy unibody.

    The Extreme Double-Cross Sub-Frame Connectors are the foundation your vehicles Chassis Support system, connecting together the front and rear sub-frames to strengthen the center of the car.

    An added feature of UPR’s Extreme Sub-Frame Connectors is our Unique Double-Cross Design, that reduces twisting action and eliminates the free span of the car by attaching the cross section of the sub-frame connectors to the strongest section of the floorpan.

    All of our Suspension Products are made with the Highest Quality materials and most expensive components. We spare no expense on our products and always stand behind them with our Lifetime warranty that no one else offers.

    » Unfinished
    » 1 Hour Install
    » Weld in Installation
    » 1" x 2" x .083" Mild Steel
    » Ties in the flimsy Mustang Unibody
    » Double Cross Braces ties in Seats to Subframe
    Learn More
  2. Maximum Motorsports Full Length Subframe Connectors (Black) - MMFL-5PC
    $229.97

    Maximum Motorsports Full Length Subframe Connectors (Black Powdercoated)

    • New!! The XL Series Full-length Subframe Connectors are now available exclusively from MM. We have improved on the original MM Full-length Subframe Connector design with these extra-long, extra-strong subframe connectors.
    • Maximum Motorsports was the originator of full-length subframe connectors. We have now improved on our original design by increasing the length and height of the connector tube. The resulting XL Series connector is much stiffer than any other subframe connector.
    • The MM XL Series Full-length Subframe Connectors stiffen your chassis far more than our standard connectors. The taller tubing of the new XL Series creates a connector that is 95% stiffer than the standard subframe connector. The XL connector tubing is 53% stiffer than our previous Full-length subframe connectors. Beware of connectors from companies who lack the engineering expertise to design their own products. Some have copied our previous design. The new XL Series connectors are 53% stiffer than those copies.
    • The new XL Series Full-length Subframe Connectors extend from the rear lower control arm attachment point on the rear subframe all the way up to the firewall. This provides substantially more weld area between the connector and the chassis. At 65", the extra length, increased number of attachment points, and extra height in the tubing make this the stiffest subframe connector available.
    • The XL Series Full-length Subframe Connectors are made of 1.5" x 2" x .083" wall thickness rectangular tubing. The thinner wall tubing is used to lessen the weight, while the taller dimension increases stiffness by 95% over our standard connectors. We add reinforcing plates at each bend to prevent the flexing which would otherwise occur with the thinner wall tubing.
    • 1996-98 Cobras will require modifications to the transmission crossmember mounting flanges. See supplemental information about this in the consumer instructions linked at the top of this page. This has no effect on access to the crossmember for removal purposes.
    • NOTE: Full Length Subframe Connectors always ship separately. Shipping cost for full length subframe connectors provided by on-line ordering may be inaccurate to some shipping destinations due to irregular size. You will be contacted with accurate shipping cost after your order is placed.
    Learn More
  3. Maximum Motorsports Full Length Subframe Connectors (Bare Steel) - MMFL-5B
    $199.97

    Maximum Motorsports Full Length Subframe Connectors (Bare Steel)

    • New!! The XL Series Full-length Subframe Connectors are now available exclusively from MM. We have improved on the original MM Full-length Subframe Connector design with these extra-long, extra-strong subframe connectors.
    • Maximum Motorsports was the originator of full-length subframe connectors. We have now improved on our original design by increasing the length and height of the connector tube. The resulting XL Series connector is much stiffer than any other subframe connector.
    • The MM XL Series Full-length Subframe Connectors stiffen your chassis far more than our standard connectors. The taller tubing of the new XL Series creates a connector that is 95% stiffer than the standard subframe connector. The XL connector tubing is 53% stiffer than our previous Full-length subframe connectors. Beware of connectors from companies who lack the engineering expertise to design their own products. Some have copied our previous design. The new XL Series connectors are 53% stiffer than those copies.
    • The new XL Series Full-length Subframe Connectors extend from the rear lower control arm attachment point on the rear subframe all the way up to the firewall. This provides substantially more weld area between the connector and the chassis. At 65", the extra length, increased number of attachment points, and extra height in the tubing make this the stiffest subframe connector available.
    • The XL Series Full-length Subframe Connectors are made of 1.5" x 2" x .083" wall thickness rectangular tubing. The thinner wall tubing is used to lessen the weight, while the taller dimension increases stiffness by 95% over our standard connectors. We add reinforcing plates at each bend to prevent the flexing which would otherwise occur with the thinner wall tubing.
    • 1996-98 Cobras will require modifications to the transmission crossmember mounting flanges. See supplemental information about this in the consumer instructions linked at the top of this page. This has no effect on access to the crossmember for removal purposes.
    • NOTE: Full Length Subframe Connectors always ship separately. Shipping cost for full length subframe connectors provided by on-line ordering may be inaccurate to some shipping destinations due to irregular size. You will be contacted with accurate shipping cost after your order is placed.
    Learn More
  4. Stifflers 94-04 Mustang FIT System
    $459.00

    The FIT System is a modular approach to achieving the ultimate in chassis stiffness and strength through design.

    By integrating three key components into a modular system, the Fully Integrated Technology (FIT) System has taken the next step beyond normal stiffening products. Not just randomly conceived and grouped together parts, countless hours of research and testing have gone into fully optimizing these systems!

    End result..... the ultimate in chassis stiffening for your Mustang!

    This FIT System includes:
  5. Subframe Connectors .......P/N: SFC-M01
  6. Stiffening Rails ...................P/N: SR-M01
  7. Web Brace ..........................P/N: WEB-M01
    -Allows suspension to work as designed, giving overall improved ride quality, handling and increased range of suspension tuning.
    -Transfers more power to the ground, not wasting it twisting and bending the chassis
    -Launches straighter
    -Stiffer chassis reduces or eliminates interior rattles and extends life of vehicle.
    -Weld locations free of powder coat, NO removal of powder coat required before installation for significant time savings.
    -Slide-2-SizeTM mounting system makes Web Brace installation nearly effortless; simply slide bracket into place and weld, for a custom fit every time.
    -Non-intrusive, no floors to cut, interior to remove or lines to relocate
    -Ground clearance remains unchanged
    -Increases side impact safety

    To fully extract your car's potential check out the Lower Chassis and Spider Braces!

    Learn More
  • Stifflers 79-04 Mustang Subframe Connectors
    $159.00

    Engineered to be the stiffest, lightest and easiest to install weld-on full-length subframe connectors on the market today!

  • Design optimized using CAD/CAE software combined with real-world chassis deflection test data.
  • Full length, manufactured of 1.5 x 2 x .083 rectangular tubing for the ultimate in stiffness, reduced weight and maximized surface area between subframe and connector.
  • Integral laser-cut cross-brace reduces free span, reinforces floor pan and minimizes required welding during installation.
  • Industrial grade powder coat for long life, to outlast the vehicle.
  • Pre-masked areas for welding require NO removal of powder coat before installation, for significant time savings!
  • Crimped and welded tube ends seal out moisture while also increasing strength.
  • Engineered to contour subframe for an exact fit with no loss of ground clearance.
  • Can be used alone or with Stifflers Fully Integrated Technology (FIT)SystemTM.
  • Learn More
  • Stifflers 94-04 Mustang Stiffening Rail
    $79.00

    More than just a place to put your jack...

    Installed behind the rocker panel pinch weld lip, these rails multi-task by adding strength and stiffness to your Mustangs chassis as well as providing a safe and solid foundation for your jack. Pre-masked areas for welding means no powder coat to grind away, for a quick and easy installation! A must for all track and lowered cars!

    - Manufactured of 1 x 1.5 x .083 rectangular tubing for great strength-to-weight ratio.
    - Increases chassis stiffness and strength for improved handling.
    - Provides a safe, solid and convenient location for your jack.
    - Pre-masked areas for welding require NO removal of powder coat before installation.
    - Supplied with plastic end plugs to help keep moisture out.
    - Industrial grade powder coat for long life, to outlast the vehicle.
    - Added level of safety in event of side impact.
    - Can be used alone or with Stifflers Fully Integrated Technology (FIT)SystemTM.
    Learn More
  • UPR 79-04 Mustang Full Length Subframe Connectors
    $159.99

    UPR's Full length subframe connectors are the strongest and best engineered design available from their Ultra strong cross braces to UPR's Pro-Series Torque Box reinforcement plate kit.

    Our new Full Length Subframe connectors have reinforcement plates built in minimizing welding time and adding rigidity to the full length connector.

    Our new full length subframe connectors run the complete length of the subframes to strengthen the chassis and floor pan. This makes for improved ride quality and handling second to none.

    These 1.25" x 2" full length subframe connectors are ideal for your daily driver or high horsepower race car. Includes reinforcement plates at each bend and include UPR's Pro-Series torque box reinforcing plate for the strongest attachment to the rear subframe area possible.

    » Mild Steel
    » Unfinished
    » 1 Hour Install
    » Weld in Installation
    » Full Length Subframe Connectors
    » Ties in the flimsy Mustang Unibody
    » Torque Box Reinforcement Plates Included
    » Double Cross Braces ties in Seats to Subframe
    Learn More
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