A suspension system upgrade designed primarily for vehicles undergoing significant performance modifications, this assembly replaces the factory rear suspension components from the midpoint (back half) of the vehicle. It commonly includes four control arms per side, mounting brackets, and a crossmember, offering enhanced control over axle movement. For example, in drag racing applications, it is frequently installed to improve traction and launch capabilities.
The utilization of this modification is pivotal in optimizing vehicle handling and power transfer, particularly in high-horsepower or racing scenarios. Its application provides improved axle stability, reduced wheel hop, and increased adjustability, enabling fine-tuning of suspension geometry to suit specific track conditions or driving styles. Historically, its adoption stemmed from the limitations of factory suspension systems in handling increased power outputs.