Performance Bodies Eibach ESS Speedway Conventional Single Rear Coil Spring 250 lbs in Rate, 3.61 in. Block Height ERS Eibach 3.0 coilover spring 1800 300 0450 silver for 2.5 coil over Eibach 1500.500.0225 Spring 15In Rear 5In Od Coil Spring, Conventional ERS Eibach ERS Race Spring System Single Standard Coil Over Spring 0500 Eibach 1100.500.0300 Eibach Conventional Rear Coil Springs Summit Racing. 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. 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. Standard Features Ultra Lightweight for Reduced Unsprung Mass Maximum Travel in Combination with Smallest Block Heights Lowest Side Loads with Load Center Ideally Located Relative to the Spring Axis Precision Tolerances The Tightest in the Industry Each Spring Individually Tested and Rated Specifications Part Number 1200. 500. 0250 Part Name Coil Spring UPC 00803050516138 Length 12 in. Diameter 5. 00 I. D. Spring Rate 250 lbs in Block Height 3. 61 in. Travel 8. 39 in. Block Load 246 lbs. Spring Type Conventional Individual Conventional Race Spring Notes Without QuadraSteer