Bump Stop Cup 2.3in OD Flat Wire

The Bump Stop Cup 2.3in OD Flat Wire by SWIFT SPRINGS is a precision suspension component engineered to control and limit suspension travel during extreme compression cycles. Whether you're building a high-performance street machine, prepping for track duty, or engineering a custom suspension setup, this bump stop cup serves as the final safeguard against metal-to-metal contact when your suspension reaches its maximum compression point. Bump stops are critical for any serious vehicle modification, preventing damage to shock absorbers, control arms, and frame components while maintaining predictable suspension behavior under hard cornering or aggressive acceleration.

This bump stop cup features a 2.3-inch outer diameter with a flat wire construction, a design choice that optimizes contact surface area and load distribution during compression events. The flat wire geometry reduces stress concentration points compared to round-wire alternatives, extending component life and providing more progressive engagement as suspension loads increase. SWIFT SPRINGS' engineering focuses on durability and consistent performance across repeated compression cycles, making these cups ideal for both autocross competitors and daily-driven modified vehicles. The compact 0.75-inch height integrates cleanly into modern coilover setups and custom suspension assemblies without requiring extensive fabrication work.

Mechanics and suspension specialists frequently install bump stop cups when upgrading to lowered springs, adjustable coilovers, or performance dampers that increase compression rates. The 2.3-inch OD sizing ensures compatibility with most aftermarket coilover towers and spring bucket configurations found on contemporary performance platforms. Installation requires precise measurement of compression height and proper seating against the shock's upper mount—failure to install correctly can result in premature bottoming and component failure. This bump stop cup is an essential addition to any suspension build where maintaining clearance and preventing catastrophic compression damage is non-negotiable.