Mopar E-Bodies - "Hot Rod" Chassis Stiffening Kit
This kit Fits the Dodge Challenger E Bodies from 1970* through 1974, and the Cuda which has a wheelbase that is different and requires a different frame connectors!!
* Please call if you have an Early built 1970, we have had reports of the early cars having fitment issues in the torque box area frame connectors
Each US Car Tool Chassis Stiffening kit includes:
- A Pair of Frame Connectors
- A set of four Hot Rod Torque boxes
- A pair of front inner fender braces
- A front lower core support frame brace
Purchasing these chassis stiffening components as a kit will save substantially over purchasing these individually.
Where does the Chassis Stiffening Kit mount?
The kit mounts to the unibody of your Challenger and adds strength and stiffening to the entire unibody structure. This the most complete kit and adds the most strength available, short of adding a full roll cage to your car.
Does my car need a Chassis Stiffening Kit?
The factory engineers added stiffening to some ares of the E-Bodies, so they recognized the benefits of the bracing 40+ years ago. We've just got the benefit of seeing how these react to the added chassis stiffening. Any car will benefit from the additional chassis (unibody) stiffening, especially if you are increasing the horsepower or just want you car to feel more "solid" going down the road.
Frame Connectors add strength to the middle portion of the unibody, our design maximizes the strength of these via cantilever beam engineering to increase the Section Modulus of Elasticity. This is twice as strong at half the thickness!!
Torque Boxes distribute the brute forces placed on the Unibody at active suspension mounting locations; think front leaf spring hangers pushing the car forward on a 600hp launch!
Inner Fender Braces add stiffening to a front frame rail system that was prone to twisting.
The front Lower Core Support brace connects the extreme front ends of the front frame rails to help make them stronger and less prone to twisting.
When you remove the flex from your chassis (Unibody) you allow the suspension to work as it is designed. Now you can adjust spring rate, roll resistance (sway bars) and shocks and actually see and feel the difference!
Are these duplicates of the OEM factory Braces?
No, we build a version we refer to as our Hot Rod Brace Upgrade. Some of the stiffening components fit in the factory location, such as the torque boxes and inner fender braces, other components just add strength to known weak spots on the unibody.
Do these require welding?
Yes, installing a Chassis Stiffening Kit requires them to be welded into position.
Will you install the components onto my car?
Yes, our installation center installs all the parts we manufacture for a set low price.
I'm not sure exactly what I need for my MOPAR suspension upgrade, can you suggest an upgrade to my car?
Yes, we have installed chassis stiffening components on 100's of MOPAR's and have been in business saving old MOPAR's for over 10 years. Contact us at (919) 855-8200 with any additional questions - we like to help!!
Here is a YouTube Video of a 1970 E Body after installing our Chassis Stiffening Kit Components, this one highlights just how much stiffer the front frame rail sub system gets after the inner fender brace kit is installed,