Bump Spring Cup 16mm 1.160 Cup Step OD 10pk

The Bump Spring Cup 16mm 1.160 Cup Step OD 10pk from Allstar Performance is an essential component for precision suspension tuning in drag racing, circle track, and performance street applications. These spring cups function as the interface between your coil-over spring and the suspension mounting point, managing spring seating geometry and load transfer during compression and rebound cycles. Built for builders who demand reliability under extreme suspension dynamics, this 10-pack provides the replacement inventory serious competitors need to maintain peak suspension performance across multiple vehicles or throughout a racing season.

Each bump spring cup features a 16mm bore diameter with a 1.160-inch cup step outer diameter, engineered to seat coil-over springs with precision concentricity that prevents lateral spring deflection during high-load events. The stepped OD design provides a larger bearing surface that distributes spring pressure more evenly across the suspension tower or mounting bracket, reducing stress concentration and extending component lifespan. Allstar Performance's manufacturing standards ensure consistent dimensional tolerances across all ten units, critical for vehicles running matched suspension setups where inconsistency can introduce handling imbalance or unpredictable spring rates under hard cornering and acceleration.

This 10-pack suits racers, suspension shops, and dedicated enthusiasts building or maintaining coil-over systems on short-track race cars, drag racing platforms, and high-performance street vehicles. Weighing just 0.8 lbs per pack, these cups are lightweight yet robust enough to handle the repeated compression cycles and thermal stress of motorsports duty. Compatible with most aftermarket coil-over kits using 16mm spring seats, the bump spring cup is a consumable item best stocked in bulk to avoid suspension downtime between rounds or between-season service intervals.