The Steeda system is ok.
If you do not have to abide by any rules like SCCA A-sedan, it is not that good. It still keeps the original quad design in tact, not good. The way to really trick out the rear suspension on a Late model Mustang is to remove the binding upper control arms and going with a torque arm system like Griggs or MM offers. This will almost eliminate all binding caused by the crappy 4 link original set up. This basically turns it into a 3 link system and puts the control arms on the same plane as the 3rd link (torque arm).
