Spring 10in Coil-Over 2.5in OD

The Spring 10in Coil-Over 2.5in OD by EIBACH delivers the precision suspension geometry that separates a competent handling platform from a truly refined driving experience. Coil-over springs are the foundation of modern suspension tuning, enabling independent control of ride height and spring rate without compromising damper performance. Whether you're building a track-focused machine, daily driver with improved compliance, or restoration project requiring adjustable geometry, this 10-inch coil-over spring addresses the core challenge: maintaining consistent spring force while accommodating real-world ride quality and corner-carving dynamics that factory springs simply cannot achieve.

This EIBACH spring features a 2.5-inch outer diameter (OD) construction, engineered to interface with coil-over damper assemblies across popular suspension platforms and aftermarket systems. The 10-inch length provides optimal spring seat engagement and load-bearing surface area, reducing binding and ensuring consistent force delivery throughout the suspension travel range. EIBACH's spring steel formulation and winding geometry are calibrated to deliver progressive rate characteristics that maximize tire contact patch during acceleration, braking, and lateral load transfer—critical factors in both autocross competition and street performance driving. The compact 4.2 x 4.1 x 11.1-inch envelope and modest 3.65-pound weight make installation straightforward, integrating seamlessly into complete coil-over kits or upgrade packages without adding unsprung mass that degrades response time.

Enthusiasts upgrading from factory coil springs—particularly those transitioning to adjustable coil-over dampers—will immediately appreciate the tuning precision this spring enables. Application compatibility spans multiple platforms when paired with appropriate damper bodies and mounting hardware; verify your specific vehicle model and coil-over system's spring ID and seat diameter before purchase. Installation pairs best with matched dampers, as spring rate synergy directly impacts suspension response, anti-roll axis characteristics, and load transfer efficiency. For serious suspension builders, road racers, and mechanics seeking repeatable spring performance data, EIBACH's MPN 1000.250.0325 is a reliable specification reference for sourcing exact replacements or building complementary suspension packages.