Level 3 Chassis Stiffening Kit

The US Car Tool Level 3 Chassis Stiffening Kit is engineered to significantly enhance your vehicle's structural integrity and performance, particularly for Mopar E-Body models. Whether you're engaging in straight-line acceleration, autocross, or spirited canyon carving, this kit ensures your car moves powerfully without excessive chassis flex. The Level 3 kit includes a complete set of components: a pair of CNC frame connectors, front and rear torque boxes, a pair of front inner fender braces, a front lower core support stiffener, a rear spring relocation kit, and a mini tub kit. The mini tub kit is designed to add up to 4 inches of tire clearance per side, accommodating larger tire and wheel combinations for maximum traction. This kit is specifically designed for the Dodge Challenger E-Body from 1970 through 1974. (Note: Part Number USCT1M1031 is available for Plymouth Cuda cars). Early production 1970 models may require a call to confirm fitment in the torque box and frame connector areas, as some early builds have reported fitment issues. Installation of the Level 3 Chassis Stiffening Kit requires welding. The components mount to the unibody, increasing its strength and stiffness to a level approaching that of a full roll cage. By reducing chassis flex, the suspension components can function as intended, allowing for more effective tuning of spring rates and sway bars. The rear spring relocation feature further contributes to maximizing tire clearance.