1979–93 Fox-body Mustang chassis stiffening
6 kits to stiffen the frame, from frame rails and connectors to braces and roll bars.
Stiffening kits
| Area | Kit | What it is | Price |
|---|---|---|---|
| Subframe connectors | Maximum Motorsports Sub Frame Connectors Full Length Set (MMFL-5B-FULL) | Full-length weld-in; includes seat braces. | $239.97 CJ Pony Parts price Source |
| Subframe connectors | BMR Suspension Full Length Subframe Connectors Coupe/Hatchback (SFC010) | Boxed full-length connectors with laser-cut weld plates. | $409.95 CJ Pony Parts price Source |
| Subframe connectors | Detroit Speed Subframe Connectors With Lower Torque Box (010114DS) | Ties rear torque box to firewall; advanced install. | $749.95 CJ Pony Parts price Source |
| Torque boxes | BMR Suspension Torque Box Reinforcement Plate Kit (TBR001) | Bolt-in plates; welding optional for added strength. | $99.95 CJ Pony Parts price Source |
| Shock & strut tower braces | Maximum Motorsports Strut Tower Brace Black EFI 1986-1993 (MMSTB-1) | EFI cars; not compatible with 351W. | $229.97 CJ Pony Parts price Source |
| Roll bar & cage | Maximum Motorsports Roll Bar Sport 4-Point, Fixed Harness Mount (MMRB-1.2) | Bolts to chassis; coupe/hatchback. | $867 CJ Pony Parts price Source |
Prices are from the linked seller pages and change often. Confirm fitment for your exact year and body style before ordering; many weld-in parts need professional installation. Some links earn us a commission.
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