4-Link Kit

The Competition Engineering 4-Link Kit (model C2017) is a weld-on suspension control system designed for vehicles requiring enhanced axle location and stability during acceleration, braking, and cornering. This standard series 4-link kit comes complete with all necessary brackets and hardware, delivering a bolt-together solution for custom chassis and performance vehicle builds where precise rear-end geometry is critical to handling and traction.

The kit accommodates 3-inch axle tubes and is constructed from steel and chromaly materials in natural finish, providing the structural integrity required to manage lateral and fore-aft forces under hard acceleration and deceleration. Four-link suspension systems work by using four control arms (two upper, two lower) to locate the rear axle while allowing vertical suspension movement, resulting in reduced wheel hop and improved traction compared to older leaf-spring or simple two-link designs. The weld-on configuration gives builders full control over bracket placement and geometry tuning, making this kit suitable for drag racing, road racing, street performance, and off-road applications where axle control is non-negotiable.

This 4-link suspension kit is engineered for fabricators and performance enthusiasts who are designing custom rear suspensions from the ground up or upgrading existing systems. The included brackets and fasteners eliminate the need to source components separately, streamlining the build process. Typical applications include classic muscle car restorations with modern performance upgrades, tube-frame race cars, street rods, and custom off-road vehicles where OEM suspension geometry is not available or inadequate for the intended power level and driving demands.

Competition Engineering is recognized within the suspension fabrication and hot-rod community for developing reliable control arm kits and suspension components that balance ease of installation with adjustability. The 4-link configuration remains the industry standard for high-performance rear-end location because it provides independent control of anti-squat, anti-lift, and lateral axle movement—advantages that cannot be matched by simpler designs. Choosing a dedicated suspension kit over improvised solutions ensures repeatable geometry and proper load path through the chassis.