MM 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.

 
Standard Subframe Connectors
 
bulletMM 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.)
 
bulletOur 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.
 
bulletWe seal the tubing by welding on end caps to prevent them from rusting from the inside out.
 
bulletThe MM connectors have a cross brace used to reinforce the crack-prone area of the floor pan where the seats attach.
Our connectors are custom shaped to hug the floor pan of your Mustang for maximum ground clearance.
  Full Length Subframe Connectors
 
bulletNew!! 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.
 
bulletMaximum 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.
 
bulletThe 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.
 
bulletThe 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.
 
bulletThe 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.
 
bullet1996-98 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.
bulletNOTE: 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.
Standard Length Subframe Connectors
Part # Description Price Qty Purchase
MM-SF-1B 1979-93 Mustang Maximum Motorsports Standard Subframe Connector Set
Bare Steel		 $79.00/set
MM-SF-1PC 1979-93 Mustang Maximum Motorsports Standard Subframe Connector Set
Powder Coated Black		 $109.00/set
MM-SF-3B 1994-04 Mustang GT & Cobra Maximum Motorsports Standard Subframe Connector Set
Bare Steel		 $79.00/set
MM-SF-3PC 1994-04 Mustang GT & Cobra Maximum Motorsports Standard Subframe Connector Set
Powder Coated Black		 $109.00/set
MM-SF-5B 1983-88 Thunderbird Maximum Motorsports Standard Subframe Connector Set
Bare Steel		 $89.00/set
Full Length Subframe Connectors
Part # Description Price Qty Purchase
MM-FL-1B 1979-93 Mustang (except conv) Maximum Motorsports Standard Subframe Connector Set
Bare Steel		 $119.00/set
MM-FL-1PC 1979-93 Mustang (except conv) Maximum Motorsports Standard Subframe Connector Set
Powder Coated Black		 $149.00/set
MM-FL-2B 1983-93 Mustang Convertible Maximum Motorsports Standard Subframe Connector Set
Bare Steel		 $119.00/set
MM-FL-2PC 1983-93 Mustang Convertible Maximum Motorsports Standard Subframe Connector Set
 Powder Coated Black		 $149.00/set
MM-FL-3B 1994-04 Mustang Maximum Motorsports Standard Subframe Connector Set
Bare Steel		 $119.00/set
MM-FL-3PC 1994-04 Mustang Maximum Motorsports Standard Subframe Connector Set
Powder Coated Black		 $149.00/set
MM-FL-4PC 1984-92 Lincoln Mark VII Maximum Motorsports Standard Subframe Connector Set
Powder Coated Black		 $189.00/set

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