• Foxbody-Mustang


Detroit Speed is proud to offer a new line of products for the 1979-93 Fox Body Mustang enthusiasts.

An iconic sports car of the 1980s, the Fox Body platform brings to life the spirit of driving.  The product line currently includes Subframe Connectors, Mini-Tubs and Rear Suspension will be coming Fall 2020.  Front Suspension will be available in 2021.

Staying true to the Company's core values, the Fox Body Mustang product line has been designed and tested to meet the attention to detail and stringent quality standards that customers have come to expect from Detroit Speed.  The opportunity with this product line was to offer a solution that would correct many known issues with the Fox Body platform.  These components are designed with daily driving, dragstrip, autocross and track use in mind.

Check out our latest product line below and supporting videos.


Fox Chassis Stiffening Kit - (1979-93 Mustang / 1979-86 Capri)
  • USD $624.95
  • Retail price USD $624.95
  • Qty:
Ford 351ci Windsor Oil Pan & Pickup - (Detroit Speed Aluma-Frame)
  • USD $574.95
  • Retail price USD $574.95
  • Qty:

Get familiar with each of the new Detroit Speed 1979-93 Fox Body Mustang products!




Detroit Speed 1979-93 Fox Body Mustang Subframe Connector Install

In this video, Detroit Speed Engineer & Fabricator, Blake Tomlinson installs Detroit Speed's 1979-93 Fox Body Mustang Subframe Connectors on a 1989 Mustang LX Coupe.  

These 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.

Learn more about Detroit Speed's 1979-93 Fox Body Mustang Subframe Connectors.





Detroit Speed 1979-93 Fox Body Mustang Mini-Tubs

Detroit Speed Mini-Tubs are inner-wheel housings manufactured to accommodate a wider tire and wheel package, providing more grip on the street, dragstrip, autocross, or track! Stamped from 18-gauge steel and made in America, these Mini-Tubs will help you achieve the stance and solid foundation you are looking for.


NOTE: Mini-tubs eliminate the factory shock mounting location. A coilover relocation kit is required. Detroit Speed’s Fox Body Coilover Conversion kit is the perfect compliment.


Features & Benefits: 

  • Designed to retain stock appearance
  • Allows up to a 315 tire without rolling, flaring, or frame rail modification
  • Includes new seat belt mounts and required hardware




041647_Group  2X060120A-Rear 3Qtr  2X060120A-Bottom

Detroit Speed 1979-93 Fox Body Mustang Rear Suspension

Detroit Speed's Fox Body Mustang Rear Suspension is modular!  Each of the components can be used individually or all at once.  The full suspension features a sway bar, adjustable track bar, coilover conversion, and our patented Swivel-Links™.  The components may be purchased separately or grouped together into Speed Kits.


The Detroit Speed Fox Body Mustang Sway Bar offers multiple advantages over the non-effective stock rear bar.  Detroit Speed sway bars attach to the rear end housing and the frame rail, where the stock bar only connects to the lower suspension links.  By using the chassis to stabilize the rear axle as opposed to the opposing link, the deflection of the vehicle under heavy cornering is minimized.  Detroit Speed sway bars mount with a low-friction ball-style end-link, allowing free articulation of the bar, eliminating binding through the range of rear suspension travel.


The Detroit Speed Fox Body Mustang Track Bar adds a critical link to keep the rear axle stable during hard cornering.  The factory 4-link is completely ineffective at locating the axle side-to-side as the suspension arms travel vertically.  The addition of a Detroit Speed Track Bar to the Fox Body Mustang will prevent the axle from wandering unpredictably.  The track bar connects to the rear axle to the chassis of the vehicle, which helps keep the axle centered under the chassis during suspension travel.  This gives the driver better grip and acceleration off the line and more confidence in the corners.  The track bar brackets bolt-on through holes added into the frame rail and U-Bolts to the factory 8.8 rear axle.


The Detroit Speed Coilover Conversion Kit allows the latest in coilover spring/shock technology to be bolted on to any Fox Body Mustang, bringing your classic's handling and ride into the 21st Century with our 'Detroit-Tuned' valving.  The springs are removed from the lower control arms and shocks mounts are relocated into the frame rail for maximum strength and wheel/tire clearance.  Once coilover conversion is complete, Detroit Speed Mini-Tubs may be installed in the car at any time.


The Detroit Speed Swivel-Links eliminate bind and allow the suspension to fully articulate without the use of noisy spherical rod ends.  Swivel-Link rear links allow for easy pinion angle adjustment without unbolting from the car for improved traction, lower driveline vibrations.  The Fox Body Mustang Swivel-Link Kit comes with new hardware and directly bolts on to replace the factory links.  A coilover conversion kit is required before installing Swivel-Links, as there is no spring perch on the Swivel-Link like on the factory arm.


Features & Benefits: 

  • Modular design allows components to bolt-on individually or all at once
  • Bolt-on tubular sway bar mounts directly to the chassis and axle - more effective than factory bar
  • Bolt-on track bar adds a critical link to keep the rear axle centered and stable during hard cornering - absent from the stock Fox Body Mustang
  • Bolt-on coilover conversion relocates the springs/shocks to the frame rail for maximum strength and wheel/tire clearance
  • “Detroit-Tuned” coilover springs/shocks optimized for modern ride quality, handling and ride-height adjustment
  • Bolt-on Detroit Speed Swivel-Links are stronger than factory control arms and eliminate bind, allowing the rear suspension to fully articulate
  • Easily adjust wheelbase and pinion angle without unbolting Swivel-Links from the car for improved traction and lower driveline vibrations
  • Provides clearance for custom exhaust up to 3" (depending on tire and mini-tub width, fuel tank modification may be required)
  • Laser-cut brackets compatible with original frames and axles 



Learn more about Detroit Speed's Rear Suspension option for your 1979-93 Fox Body Mustang.  Shipping Fall, 2020.







Detroit Speed 1979-93 Upper Torque Box Reinforcement Kit

The Upper Torque Box Reinforcement Kit 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 solution that improves the rigidity of the torque box, prevents damage to the chassis, and improves the safety of the vehicle.  The Detroit Speed Upper Torque Box Reinforcements are a highly recommended addition to any Fox Body Mustang - especially those that are driven hard with higher horsepower.


Features & Benefits: 

  • A Bolt on Kit with Weld in capability
  • Fixes weaknesses in the upper torque box with bolt on solution to prevent tearing in cars up to 400hp
  • Welding kit in supports torque boxes in cars 400+hp
  • Ties link pockets into the frame and floor pan on both sides of the frame rail, as well as connecting the two boxes side to side.
  • Provides second adjustment hole for upper link to help correct instant center on lowered cars
  • Works with stock links in both hole positions.