Eibach (Coilover Springs) EIB ERS Springs : Part# 0175.225.0150 Eibach 1000.1880175 Eibach ERS Coil Over Main Spring 803050111807 eBay Eibach ERS 18.00 in. Length x 3.00 in. ID Coil Over Spring Eibach ERS 7 x 2.5 x 450lb spring Eibach ERS Coil Over Spring Single Spring 9.00 inch L x 2.25 inch dia x. Eibach's ERS line has evolved over the years to be the world's most prominent, comprehensive and superior Race Spring System. Eibach Race Springs are all manufactured in series production, often repeated, with a strong manufacturing experience. Thus, Eibach constantly achieves the most linear spring characteristic (rate) while maintaining the lowest tolerances and the highest quality in the industry.