Springs lower car much more than stated

[SFM]

Well, it isn't my Stinger, but it's for a friend of mine and I'm curious to know what's the reason just in case I lower my Stinger as well. Basically, my friend tried ARK GT-F and Eibach lowering springs and the car drops way more than the expected 0.75-0.80 inches of both springs. What could be the cause? I cannot provide pictures, but when I parked beside his Stinger it looked much lower than 0.80 inches compared to my Stinger, and there was almost no fender gap. In stock height you can fit about 3 fingers in the fender gap but after he lowered the car only about 1 finger fits or probably less.

 

[moinmoin]

you can fit about 3 fingers

Ensure that you always use the same fingers, mine are really fat, particularly the middle fingers. They really stick out!

 

[SFM]

Ensure that you always use the same fingers, mine are really fat, particularly the middle fingers. They really stick out!

It was the same fingers lol

 

[Snowwhite]

I wish that was my problem. mine dropped less than advertised both times I've installed GT-Fs