Our full-length sub-frame connectors are designed to fit under the car and stiffen up the frame.  These are a simple install!  What separates ours from the competition?  Our sub-frame connectors come with torque box reinforcements that insure to stiffen the frame rails from front to back!  They come powder coated black with pre-cut holes in the material to provide for easier spot welding while installing.  Kit includes adjustable seat reinforcements to ensure a perfect fit for any 79-93 and the 94-04 Mustang! The main tubes of our sub-frame connectors are constructed of 1-1/2" .120 wall steel, and CNC formed.  All the plates are cut in house out of .125 1085 Mild Steel to ensure strength every time!   Made proudly in Detroit!