Ibach suspension
Mustangman, I have had this system on my 2000 GT for aprox 2yrs.(when it first came out) I have had 7 mustangs and this is the best suspension set-up I have ever used. This (sagging crap) Is from people that do not know what they are talking about. All springs,reguardless of who puts their name on them,have a "run in" or sag time. I will last aprox 1 week. This system(Ibach) will not achieve its advertized drop of 1.5 inches until that time. All,repeat,All springs will do this to a certain extent. Ibach is a highly reguarded German MFG. that makes suspension systems for mercedes Benz,BMW,Aoude, and others.This co. has been a leader for many years. dont disreguard these people,they know what they are doing. Check with local mustang clubs that put on auto crosses,perhaps the local chaptor of the SVT owners club,etc. these people will help you gather solid info also. Good luck.
John