The Detroit Speed Fox Chassis Stiffening Kit is designed to give maximum stiffness to the notoriously flimsy Foxbody chassis. This kit combines our Subframe Connectors and Detroit Speed EXO Brace.
Subframe Connectors
The Detroit Speed Subframe Connectors are designed to give maximum torsional stiffness connecting the front and rear frame rails. The connectors do not hang lower than the rocker pinch flange so ground clearance is unaffected.
In addition to front seat mounting brackets that are stronger than factory, the connectors provide torque box and lower link reinforcement. The greatest value of this kit is that it fixes two common Fox Body issues with a single integrated solution.
Features and Benefits:
Detroit Speed EXO Brace
The Detroit Speed EXO Brace fixes a notorious failure point on the Fox Body platform. This is the point where the upper links mount to the chassis. The factory torque boxes weaken over time and are known to tear or even rip completely out of the vehicle.
Losing an upper link mount can result in unpredictable handling and is dangerous at any speed. Detroit Speed has developed an effective bolt-on (or weld-in) solution that improves the rigidity of the torque box, prevents damage to the chassis, and improves the safety of the vehicle.
It ties the link pockets into the frame and floor pan on both sides and connects the two boxes side-to-side with a telescoping feature. The Detroit Speed EXO Brace kit is a highly recommended addition to any Fox Body Mustang - especially those that are driven hard with higher horsepower.
Features and Benefits:
Detroit Speed puts a significant amount of effort into developing long-lasting, dependable products that are formulated to exceed late-model performance expectations. Our systems are designed by exceptionally qualified engineers and built by fabricators dedicated to making the best systems they possibly can. Our parts are made using state-of-the-art manufacturing technologies–CNC machining, forging, hydroforming, and more–to bring your classic muscle car to the 21st century.
Months of testing, revising, and polishing stand behind every product we make available to the public, and our test cars prove the point. Each of our development mules receive thousands of hard miles attending car shows, completing road trips, crushing autocross paddocks, and storming track days in the process. The pursuit of perfection has always been our primary goal, and it always will be. Because of this, we can confidently say our systems are the best, most comprehensive solutions to any and all your muscle car problems.
| Make | Model | Submodel | Years | Fitment Notes |
| Ford | Mustang | Cobra | 1981 | 5.0 Liter |
| Ford | Mustang | GLX | 1982 - 1983 | 5.0 Liter |
| Ford | Mustang | GL | 1982 - 1983 | 5.0 Liter |
| Ford | Mustang | GT-350 20th Anniversary | 1984 | 5.0 Liter |
| Ford | Mustang | GT | 1982 - 1993 | 5.0 Liter |
| Ford | Mustang | Ghia | 1979 - 1981 | 5.0 Liter |
| Ford | Mustang | LX | 1984 - 1993 | 5.0 Liter |
| Ford | Mustang | L | 1982 - 1984 | 5.0 Liter |
| Ford | Mustang | SVO | 1984 - 1986 | 5.0 Liter |
| Ford | Mustang | SVT Cobra R | 1993 | 5.0 Liter |
| Ford | Mustang | SVT Cobra | 1993 | 5.0 Liter |
| Ford | Mustang | Turbo GT | 1983 | 5.0 Liter |
| Ford | Mustang | 1979 - 1981 | 5.0 Liter | |
| Mercury | Capri | 5.0 | 1986 | 5.0 Liter |
| Mercury | Capri | Black Magic | 1982 - 1983 | 5.0 Liter |
| Mercury | Capri | Crimson Cat | 1983 | 5.0 Liter |
| Mercury | Capri | GS | 1981 - 1986 | 5.0 Liter |
| Mercury | Capri | Ghia | 1979 - 1980 | 5.0 Liter |
| Mercury | Capri | L | 1982 - 1983 | 5.0 Liter |
| Mercury | Capri | RS Turbo | 1984 | 5.0 Liter |
| Mercury | Capri | RS | 1982 - 1985 | 5.0 Liter |
| Mercury | Capri | 1979 - 1983 | 5.0 Liter |
| Chassis Codes | Ford Mustang 1979-1993, Mercury Capri 1979-1986 |
| Engine | Ford 5.0 Liter |
| Liter | 5.0 Liter |
| Location | Rear |
| Material | Steel |
| Series | Mustang |
| Vehicle Type | Car |
