Spring Rear 20in x 5in x 70#

The Spring Rear 20in x 5in x 70# by EIBACH is a coil spring engineered for drivers seeking to dial in rear suspension geometry and ride quality on modified vehicles. Whether you're tuning a track car, street performance build, or daily driver that demands better handling, rear coil springs are the foundation of responsive suspension tuning. A 70-pound rate spring offers a balanced approach—stiff enough to resist body roll under cornering load, yet compliant enough to maintain contact patch consistency on bumpy surfaces. This 20-inch length rear spring fits a wide range of applications and works as a direct replacement or upgrade component in custom suspension setups.

EIBACH springs are manufactured to exacting tolerances using high-quality tempered steel, ensuring consistent spring rate across the entire compression curve. The 70# rate indicates the force (in pounds) required to compress the spring one inch—a moderate stiffness that balances comfort with control. At 5 inches of outer diameter and 20 inches in length, this rear spring provides a compact profile suitable for custom fabrication or OEM replacement scenarios where space is limited. The spring's design minimizes harmonic oscillation, reducing noise and vibration transfer to the chassis while delivering predictable handling feedback to the driver during acceleration, braking, and mid-corner transitions.

This rear spring performs best in applications where suspension geometry has been carefully matched to spring rate and ride height. Mechanics and performance enthusiasts often pair EIBACH springs with upgraded dampers (shocks or coilovers) to fully realize suspension potential and prevent bottoming out under hard use. The 20in x 5in x 70# configuration is popular in custom lowering kits, independent rear suspension builds, and race car projects where OEM springs are either unavailable or inadequate for modified performance demands. Always verify fitment with your vehicle's suspension design and confirm that mounting hardware, spring seats, and perches are compatible before installation.