Spring 12in Coil-Over 5.0in ID

The Spring 12in Coil-Over 5.0in ID from EIBACH is a precision coil-over spring designed for vehicles undergoing serious suspension modification or performance-oriented setup work. Built for enthusiasts and mechanics who demand exact control over ride height, spring rates, and damping characteristics, this component serves as the foundation for custom suspension tuning on street and track applications. Whether you're building a lowered street car, a road-course competitor, or a show vehicle with adjustable suspension geometry, this 12-inch coil-over spring provides the geometric and material foundation your system requires.

Engineered with a 5.0-inch inner diameter, this spring integrates seamlessly with standard coil-over strut and damper assemblies commonly found in performance suspension kits. The 12-inch length classification indicates this spring is optimized for mid-to-high compression ratios typical of lowered or motorsport-oriented vehicles, allowing you to achieve aggressive stance geometry without compromising shock absorber travel or binding under dynamic load. EIBACH's manufacturing process ensures consistent wire diameter, pitch uniformity, and load-bearing accuracy across the spring's working range, critical factors that directly affect suspension consistency lap-to-lap or drive-to-drive.

This coil-over spring is ideal for builders integrating aftermarket dampers or complete suspension packages requiring OEM or near-OEM bore sizing. Confirm your shock body's inner diameter and your target ride height before installation to ensure proper seating and preload engagement. The 5.91-pound weight reflects the material density and spring rate engineering built into the component; heavier springs typically indicate higher spring constants, benefiting vehicles that require stiffer support for aggressive lowering or increased corner weights. Installation should always include shock absorber and suspension geometry verification to optimize alignment and prevent binding or premature wear.