Spring 12in Coil-Over 5.0in ID

The Spring 12in Coil-Over 5.0in ID from EIBACH is a precision-engineered suspension component designed for high-performance vehicles and custom builds where precise load control and ride quality are critical. This coil-over spring is engineered for Speedway applications and conventional suspension setups, making it ideal for drag racing, road course tuning, and street performance builds that demand adjustable dampening and consistent spring rates. The 12-inch length and 5-inch inner diameter configuration fits purpose-built frames and custom suspension geometries where OEM springs fall short.

Built from high-quality steel with a durable red powder-coat finish, this spring features a 225 lb/in spring rate—a moderate rate suited for balanced handling without sacrificing ride compliance. The coil-over design allows independent adjustment of ride height and spring preload, enabling tuners and fabricators to dial in suspension geometry precisely. The robust construction and corrosion-resistant coating ensure longevity in high-stress applications, while the consistent spring rate maintains predictable vehicle dynamics across load ranges. At 5.91 lbs, the spring's weight is optimized to minimize unsprung mass while maintaining structural integrity under demanding conditions.

This component is best suited for experienced fabricators, race teams, and performance enthusiasts building custom suspension systems or upgrading existing coil-over setups on competition or high-performance vehicles. Installation requires proper suspension knowledge and appropriate tools to safely compress and secure the spring within a compatible coil-over assembly. Verify that your vehicle's suspension geometry and coil-over body accommodate the 12-inch length and 5-inch ID before purchase. When paired with quality shock absorbers and proper alignment, this spring delivers the responsive handling and load control essential for serious performance driving.