Spring Coilover 10in x 3in 400#

The EIBACH Spring Coilover 10in x 3in 400# is a precision suspension coil spring engineered for coil-over applications requiring a 400 pound-per-inch spring rate. This steel coilover spring features a 10-inch length, 3-inch inner diameter, and silver powder coat finish for corrosion resistance and durability in demanding environments. Designed to handle the specific load and travel characteristics of coil-over shock absorber systems, this Eibach coilover delivers consistent damping support for both street and performance-oriented vehicle setups.

The 400 lb/in spring rate is the critical specification governing suspension response and handling balance. This rate determines how much force is required to compress the spring one inch—a moderate rate suitable for vehicles requiring progressive suspension geometry without extreme stiffness. The 3-inch inner diameter accommodates standard coil-over shock bodies, while the 10-inch length provides the vertical travel window necessary for both compression and extension strokes. Steel construction with silver powder coat protection resists rust and maintains structural integrity across temperature swings and wet conditions common in active vehicle use.

This coilover spring suits builders and enthusiasts upgrading suspension systems on performance vehicles, off-road platforms, and race-prepared builds where fine-tuned spring rates are critical. The 400# rate bridges the gap between comfort-oriented springs and aggressive competition setups, making it a versatile choice for drivers seeking improved handling without sacrificing ride comfort entirely. Single-spring purchase allows selective upgrade of individual corners or replacement of worn springs without replacing the entire set.

Eibach is recognized for engineering precision suspension components to OEM and aftermarket specifications. Coil-over springs of this type are fundamental to adjustable suspension systems, directly influencing vehicle stance, weight transfer, and cornering dynamics. Proper spring rate matching to vehicle mass and intended use is essential for safe handling and component longevity.