Home/1979-93 Mustang Chassis Stiffeners WMS Xtrak Subframe Connectors, 1979-93 Mustang $259.99 $197.59 Maximum Motorsports MM Strut Tower Brace, 1986-93 EFI, black $283.96 Torque box reinforcement, upper kit, 1979-04 Mustang $65.93 Torque box reinforcement, lower kit, 1979-04 Mustang $65.93 Don’t see what you are looking for? Give us a call or send an email. We sell thousands of additional parts not listed on the website.