Upper Spring Cup 5-1/2in OD Spring 10pk

The ALLSTAR PERFORMANCE Upper Spring Cup 5-1/2in OD Spring 10-pack (SKU ALL56115-10) is a precision suspension component engineered for heavy-duty off-road and racing applications. This oversize upper spring cup set combines durable steel construction with a black powder coat finish to handle extreme compression cycles and corrosive track environments. Whether managing shock loads on a drag strip or absorbing continuous vibration during road racing, these universal spring cups deliver consistent load transfer and geometry management across suspension tuning scenarios.

Each component features a 5-1/2 inch outer diameter (OD) specification, allowing compatibility with spring rates and mounting configurations common in modern coil-over and independent suspension systems. The oversize profile maximizes contact surface area, distributing spring preload force more evenly and reducing localized stress concentration that can cause premature spring buckling or cup cracking. Steel construction provides the rigidity required for high-frequency suspension articulation without deflection, while the black powder coat protects against corrosion from moisture, salt, and brake dust—critical for longevity on coastal tracks or wet-weather racing environments.

This 10-pack serves teams and builders who manage multiple vehicles, maintain backup components, or operate on multi-car race programs. Serious suspension shops and road racing enthusiasts rely on bulk spring cup inventory to eliminate downtime from component wear or failure. The universal design integrates with most coil-spring assemblies without modification, making these cups an essential consumable for shops supporting bracket racing, club racing, and performance street builds.

Spring cups are a high-wear item; repeated compression cycles gradually deform the contact surface, compromising spring seating and suspension geometry. Maintaining stock or backup cups ensures your alignment and handling remain predictable throughout a racing season. For builders upgrading to higher spring rates or adjusting preload, having multiple OEM-specification cups on hand enables rapid tuning without waiting for parts orders.

Purchase the ALLSTAR PERFORMANCE Upper Spring Cup 5-1/2in OD Spring 10-pack from TacticalSurplusUSA for reliable suspension support backed by proven off-road and racing performance standards.