Xtreme-Grip™ Vintage Rear Suspension System 64-70 Mustang and Cougar, with Full Floater Rearend Housing


SKU:  RSS-10-1000-02


The CorteX Xtreme-Grip Vintage Rear Suspension System 64-70 Mustang and Cougar with Full Floater Rearend Housing is a complete redesign of the original suspension system and utilizes modern geometry that is suited for today’s performance tires. You will be delivered a complete handling transformation with modern geometry for large tire fitment.


*Includes full floater rear end housing and axles


Greater Stiffness, Improved Handling

  • Watts Link
  • Torque Arm
  • Floater Hubs
  • Adjustable ride height
  • Ideal for performance wheels
  • Increase cornering grip
  • Reduce unsprung weight and friction
  • Virtually eliminates nose dive under braking
  • Little alteration required (highly reversible)

Coilover Options * 

Rear End Options


Xtreme-Grip Vintage Rear Suspension System, with Full Floater Rearend Housing


Vehicles: Ford Mustang (64, 65, 66, 67, 68, 69, 70) and Cougar (67, 68, 69, 70)

  • Ideal for modern performance tires
  • Optimize stance, adjust ride height as much as 2.5 inches lower
  • Corrects the roll center height, lateral roll center migration
  • Minimizes bumpsteer
  • Adjustable for track or street use

A complete redesign utilizing modern geometry

Particular consideration was given to packaging, weight and suspension geometry for the vintage mustang platform.  The leaf springs suspension was discarded in favor of a watts link, torque arm, and Coilover package which does everything better than the original suspension.

Feel the reduction of unsprung weight and friction.

Rear grip is exponentially improved and power is put down effortlessly both in a straight line and coming off of corners. The torque arm serves double duty and also virtually eliminates nose-dive under braking.  Instead, the entire chassis squats as the deceleration loads push the entire car into the pavement at its center of gravity. If you’ve never driven a car with a well-designed watts link/ torque arm combination be prepared for a revelation. You won’t go back to anything else!

Easy install with minimal alteration to your Mustang

The CorteX Xtreme-Grip Vintage Suspension System is designed to install with minimal permanent modifications to your pony.

To install the CorteX Vintage Rear Suspension System the only permanent modifications required are the weld-in subframe connectors and a simple modification to the rear trunk sheet metal just ahead of the gas tank to gain adequate clearance for the watts link and coil-overs.  Rest assured, all modifications for a CorteX build can be reversed at a later time if desired.

A Vintage Mustang has a lightweight flimsy unibody chassis that can compromise handling; as a result, when other suspensions systems require the car to be completely cut up during installation… but, this actually makes the vehicle even flimsier than factory original while adding additional weight in the process.

Professionally engineered to increase chassis strength and stiffness

The engineers at CorteX optimize superior responsiveness and durability using professional engineering and testing methods.

Pro Tip – CorteX recommends that the Xtreme-Grip Vintage Rear Suspension System be installed concurrently with the Xtreme-Grip Vintage Front Suspension System.


  • Xtreme-Grip Vintage Watts link System
  • Xtreme-Grip Vintage Torque arm
  • Coilover shocks – Koni standard, JRi, Penske, and Öhlins available as options
  • Sub Frame Connectors
  • Rear Lower Control Arms
  • Full Floater 9 inch Rearend Housing and axle
  • All necessary hardware

Coil-overs are available separately. See options below.

Additional information

Weight 250 lbs
Dimensions 72 × 36 × 24 in


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