Extended Length Upper Spring Cup

The ALLSTAR PERFORMANCE Extended Length Upper Spring Cup (ALL 56125) is a precision suspension component engineered for 5-inch coil springs in rear-axle applications. Built from steel with a durable black paint finish, this extended-length upper spring cup is designed to maintain proper spring alignment and load distribution in high-demand off-road, racing, and heavy-duty vehicle platforms where OEM or upgraded suspension geometry requires additional vertical clearance or articulation.

The extended length profile accommodates taller spring configurations and provides the critical interface between the coil spring and the vehicle frame or axle housing. Steel construction ensures the component withstands repeated compression cycles, impact loading, and the corrosive environment of off-road operation. The precision engineering allows the spring to seat properly, preventing binding, lateral movement, or premature wear—factors that directly affect suspension compliance, steering response, and vehicle stability under load.

This component is suited for builders and technicians upgrading or restoring suspension systems in trucks, off-road vehicles, and performance platforms. Whether fabricating a lifted suspension geometry, replacing worn OEM cups, or fine-tuning ride height and spring rate interaction, the extended length upper spring cup ensures the spring assembly maintains proper travel and load path through full articulation cycles.

Sold individually. Verify fitment against your vehicle's suspension specifications and spring dimensions before ordering. ALLSTAR PERFORMANCE suspension components are industry-standard in circle-track racing, off-road fabrication, and street performance communities.