Level 1 Chassis Stiffening Kit 71-72 B-Bodies
$762.64
This Level 1 chassis stiffening kit fits 71-72 Dodge and Plymouth B-bodies. Includes a pair of CNC-cut frame connectors and front and rear torque boxes.
Free shipping anywhere in the US.
Check fitment before you order
- Body: A-body (Dart, Duster, Valiant), B-body (Charger, Road Runner, Coronet) or E-body (Challenger, Barracuda)
- Model year and engine (small block, big block, 426 Hemi or Gen III Hemi)
- Steering: manual or power, and what's on the car now
Returns: within 30 days, in saleable condition, return shipping prepaid by you. 20% restocking fee. Special-order items can't be returned. Full return policy
This Level 1 chassis stiffening kit fits 71-72 Dodge and Plymouth B-bodies. Your Mopar has no full-length frame. Instead, the front frame rails and the rear rails stop short, so the floor pan has to carry the load between them. As a result, the body twists under hard launches and cornering. Frame connectors bridge that gap, while torque boxes reinforce the points where the suspension feeds force into the unibody. In fact, the factory added torque boxes to some of its highest-performance cars for exactly this reason.
What’s in this Level 1 chassis stiffening kit for 71-72 B-bodies
- Pair of CNC-cut frame connectors (set of 2)
- Front and rear torque boxes (set of 4)
The frame connectors are CNC-cut and engineered for strength, so they add stiffness without heavy, thick plate. Meanwhile, the four torque boxes spread the force at the front and rear suspension mounting points. Some pieces fit the factory locations, while others reinforce known weak spots.
A stiffer chassis lets the suspension do its job. Springs, sway bars and shocks all work better when the body stays square. So the car launches straighter, turns in sharper and feels more solid on the road.
Fitment
It fits the 1971 and 1972 Dodge and Plymouth B-bodies, such as the Charger, Road Runner and Satellite. Not sure which kit your car needs? Call us before you order and we will help you pick the right one.
Installation
These parts weld in. We recommend an experienced shop, with the car supported at ride height so the chassis is not twisted while welding. Before welding, remove undercoating and seam sealer at each weld area.
Installation guide (PDF): Download the Level 1 Chassis Stiffening Kit install guide (7 pages, 0.5 MB). It covers the frame connectors and torque boxes step by step, with a contents page so you can jump to each part. Questions during your install? Call us at 516-384-6438.
Compare the Level 2 Chassis Stiffening Kit 71-72 B Body, or see all our B-body chassis stiffeners. For install and product videos, visit the Bergman Auto Craft YouTube channel.
| Weight | 33 lbs |
|---|---|
| Dimensions | 48 × 8 × 8 in |
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