Late Model Restoration is proud to offer an inexpensive set of subframe connectors for your 1979-2004 Mustang that are guaranteed to provide increased chassis stiffness and better handling! For correct installation, Subframe Connectors must be welded.
The full length subframe connectors feature beefy 1 by 2 inch connectors which are perfect for serious cars with high horsepower, sticky tires or competition suspension. They are reinforced at each bend and include seat brackets as well as torque box reinforcing plates for a stronger attachment to the rear subframe. Full-length subframe connectors are available in a bare steel finish.
To begin installation, support the car via a drive on lift with the weight of the car supported by the wheels. A two post lift or jack stands is not recommended for this install. If your car is an automatic, remove the shifter linkage cable.Before continuing, you may have to remove your mid-pipe for easier access and working space.
Starting on the passenger side, remove the seat track hardware and position one of the seat track supports. These are side specific, and the openings for the sub frame should be in-line with the car’s frame rail. Install the other seat track support onto the driver side. The longer part of the track support will be on the inside of the frame rail.
The sub frame connectors are side specific as well.Each connector has two outer tabs; these will be closest to the front of the car and on the outside of the frame rail. Whereas the single tab will be on the inside of the frame rail. Hold the sub frame connector in place using pole jacks. It may help if you space the jack with a two by four.
Moving to the rear sub frame, align the lower torque box supports with the frame rail. These are side specific as well. The longer tab will sit on the inside of the frame rail whereas the smaller tab will be flush with the backside of the torque box. Use a permanent marker to mark to the area of the rear torque box supports. Before continuing, make sure the end sub frame connector is flush with the rear of the torque box.
Mark all of the tabs and the front of the sub frame connector. Also, place a mark about two inches inward from the rear of the frame rail, and make sure it is roughly two inches in length. Grab your welder and mask, and fully weld the seat track supports to the sub frame connector. Allow the welds to cool down, and then remove the welded assembly from the car.
Wipe the entire sub frame connector down with brake clean or denatured alcohol. Take this time to thoroughly paint the seat track supports and the tops of the sub frame connector that will mate with the bottom of the frame rail. Grind down your marked areas. Reposition the torque box supports and tack them into place. Now you can weld the entire support to the bottom of the car. Position the sub frame connector and support it via pole jacks.
Make sure the rear of the connector is still flush with the back of the torque box supports. Completely weld the sub frame connector to the surfaces that were previously prepped with the grinder. Remove the pole jacks, deburr any rough welds and then paint the remainder of the sub frame connector. Repeat these steps for the other side and you’re all finished.
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