Well if I had to guess I'm betting that as far as the rear springs are concerned they are all the same across the model line up (GT, V6, Ecoboost), however I assume the problem is the front springs. The motor in the GT weighs more than the motor in the V6 or the Ecoboost so it requires different springs to achieve the same amount of drop.Hello,
On the American Muscle website they say that the BMR GT Mustang Lowering Springs will not fit on the Ecoboost. Why is this? Thanks!