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.

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.

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.

Whether your Mustang only gets driven to the grocery store or driven hard on the road course or drag strip, every 79-04 Mustang needs subframe connectors!

Steeda's full length subframe connectors are the best full length subframe connectors available for your 1979-2004 Mustang. Perfect for daily drivers, or serious cars with high horsepower, sticky tires or competition suspension.

Not only will Steeda full length subframe connectors provide unmatched strength, but will save you time in installation over other brands!

Steeda starts with beefy 1.5 x 2 x. 083 square tubing that spans the full length of the floor pan providing unmatched chassis rigidity, improved handling, and improved ride quality with reduced impact harshness.

Our full length subframes are reinforced at each bend and include Steeda's exclusive torque box reinforcing plate for the strongest attachment possible to the rear subframe for maximum effectiveness.

Steeda Full length subframe connectors also feature a one-piece reinforced seat bolt cross brace. Some subframe cross braces have 8 individual gussets which must be carefully positioned and welded on. Other other kits use no reinforcements at all in their cross braces. Steeda's cross braces have reinforcing gussets built-in, for greater strength with less welding.

Other full length subframe connector designs do not attach all the mounting point plates to the connector, leaving you to weld them during installation adding time and complexity. Steeda full length subframe connectors come with all mounting point tabs pre-welded to the subframe connector. Another Steeda exclusive.

Note: 1996-98 Mustang Cobras will require modifications to the transmission cross member mounting points. Will fit convertible models as well as hatchback and notchback coupes. Call our sales reps for details.

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!