This modification fundamentally alters the rear suspension geometry of a vehicle. It replaces the factory suspension components behind the passenger compartment with a system typically involving two parallel bars (the “ladders”) that extend forward from the rear axle to mounting points on the chassis. These bars control axle movement and wheel hop, especially under high horsepower and acceleration conditions.
Such a system provides enhanced stability and traction, particularly beneficial in drag racing and other performance applications where maximizing power delivery to the ground is crucial. The design offers increased adjustability over stock setups, allowing fine-tuning of suspension characteristics to optimize vehicle performance on specific tracks or conditions. Historically, this type of modification emerged from the hot-rodding and drag racing scenes as a means to manage the increased power outputs of modified engines.
