Extended Length Upper Spring Cup

The ALLSTAR PERFORMANCE Extended Length Upper Spring Cup (ALL 56125) is a precision-engineered component designed for serious suspension builders and performance mechanics who demand reliability in their coilover or spring assembly systems. This upper spring cup serves as the critical interface between your suspension spring and damper assembly, ensuring proper load transfer and consistent ride characteristics. Whether you're building a street performance vehicle, a road course competitor, or a custom restoration project, this component provides the structural foundation necessary for safe, predictable suspension geometry.

Constructed with the quality standards ALLSTAR PERFORMANCE is known for throughout the racing and fabrication community, the extended length design accommodates taller spring configurations and provides enhanced stability during compression cycles. The extended cup geometry distributes spring loads more uniformly across the mounting surface, reducing stress concentration and improving the lifespan of both the spring and mounting hardware. At 2.62 lbs with compact yet functional dimensions of 7.6 x 5.3 x 8.7 inches, this component integrates seamlessly into modern coilover platforms while maintaining the precision tolerances required for repeatable performance setups.

This extended length upper spring cup is ideal for mechanics and fabricators working with aftermarket coilover kits, custom suspension builds, or performance restoration projects where standard spring cup heights prove insufficient. Compatibility depends on your specific suspension platform and damper body diameter, so verify your system requirements before ordering. Installation typically involves removing the existing upper spring cup and replacing it with this extended version, often requiring no additional modification to your existing damper or mounting points—a straightforward upgrade that significantly improves suspension geometry and component longevity.