Eibach ERS 11.00 in. Length x 5.00 in. OD Conventional Rear Spring Sanatorium Uzdrowiskowe Zocie, Szpitalna 31, Ustro 43 450. Renowned for our extensive catalog of over 1,500 precision engineered race springs. Eibach race springs offer unparalled customization and performance optimization across a wide spectrum of racing applications. From shocks to pull bars we offer a wide range of springs solutions to fine tune the handling dynamics of your race car. Warranty Installation Instructions Installation Instructions Lowest Side Loads with Load Center Ideally Located Relative to the Spring Axis Maximum Travel in Combination with Smallest Block Heights Precision Tolerances The Tightest in the Industry Ultra Lightweight for Reduced Unsprung Mass Each Spring Individually Tested and Rated