Installation Time: Shop Install
Installation Cost: $500-$1000
June 29, 2016
Much Better than I expected
First, let me tell you that I researched this decision for @ 1 year. WHY you ask? I began by researching the spring rates of Many different companies including Eibach, Ford Performance, Steeda, Steeda Lite, Maximum Motorsports, HandR etc, etc. What I found was most companies springs are a fixed rate spring that is 20 - 30 stiffer than the stock variable rate spring. Therefore, I decided that these fixed rate springs would be far less forgiving for daily street or highway miles and would be somewhat uncomfortable over potholes or highway expansion joints in my 14 GT Convertible over the stock springs. I read and researched forums where people replaced only the springs and were not happy with the ride quality or the drop. I can say that this is the best of both worlds. The stock shocks were not designed to match up with higher rate springs, and therefore, will not drop the car as much as Eibach states. By replacing both the stock shocks and springs with a system that is engineered specifically for this combination is a no brainier. I used to ride motorcycles and upgraded my shocks on a bike to a Penske shock and spring and the difference was huge. I also researched the Sport-Plus kit and contacted Eibach to find the spring rates on this system. The spring rates were almost identical, but with more of a drop.
Replacing stock components with this system firmed up the ride, and removed the floating over road dips. The car lowered the amount that Eibach states, maybe a bit more that they claim which is great. I get a smooth ride but not soft and mushy as the stock ride in a convertible is. Nosedive under braking is almost non-existent. Turns are tighter but not bone jarring hard. If you are considering replacing your springs, please make sure you also replace your shocks with a system that is engineered to match the components. By going with this system, I was assured that it will work as their engineers intend it to. I hope to upload some potot's later this week to show the difference in stock and the new ride height.
By the way I'm 57 years old and this is my 3rd mustang. I just wish I would have changed out the springs and shocks on my 2001 Cobra convertible, because I would have kept the car.