I was just wondering if anyone here knew how to find the spring rates on the following springs. (99-04 GT Coupe). 1. H&R Super sports. 2. Eibach Sportlines. 3. Steeda. Before anyone says search... I have spent the last eight hours looking on this site, Mustangboards.com, Modularpowerhouse.com, SVTPerformance.com, and the above mentioned web sites. Thanks for all your help. Jason.