Spring 12in Coil-Over 3.75in ID Silver

The Spring 12in Coil-Over 3.75in ID Silver from EIBACH is a precision-engineered suspension component designed for automotive enthusiasts and fabricators who demand adjustable ride height and dampening control. This coil-over spring serves as the foundation for custom suspension setups on street cars, track vehicles, and modified platforms where factory geometry no longer suits performance or aesthetic goals. Whether you're building a lowered daily driver, a competition-focused track car, or a show vehicle with custom chassis work, this EIBACH spring delivers the tunability and reliability expected from one of the industry's most respected spring manufacturers.

The 12-inch length paired with a 3.75-inch inner diameter provides optimal packaging for coil-over conversion kits and custom suspension builds. EIBACH's coil-over springs are manufactured from high-tensile spring steel and precisely wound to maintain consistent rate and preload characteristics across the full range of suspension travel. The silver powder-coat finish protects against corrosion while resisting heat degradation common in performance applications, ensuring longevity whether the spring resides in engine bay environments or lower control arm mounting points. The 6.15-pound weight reflects the robust construction required to handle repeated compression cycles, lateral g-forces, and the mechanical stresses inherent to motorsport and aggressive street driving.

This EIBACH coil-over spring benefits mechanics and fabricators integrating aftermarket coil-over kits into vehicles requiring custom damper assemblies and ride-height adjustment capability. Installation typically pairs with compatible shocks, struts, or damper units as part of a complete suspension system; verify mounting eye diameter and spring seat compatibility before ordering. The 3.75-inch inner diameter accommodates most modern performance damper body dimensions, making it suitable for both OEM-to-coilover conversions and ground-up custom chassis builds. Proper spring rate selection and installation with appropriate preload ensures predictable handling characteristics, reduces body roll, and facilitates fine-tuning of suspension geometry for optimal tire contact and cornering performance.