Not every car lowers the same. Close, but each one can be different. For that matter, not every Crossfire comes from the factory with the same spring pads. Put the Eibach's on with the stock pads and if the car is too low or still too high you can adjust the height by changing out the spring pads. Each spring sits in a rubber pad and the thicker the pad the higher the car will sit. It's labor intensive but worth the effort. The Eibach's are great for a daily driver but you need to be aware that rear adjustable camber arms and front crash bolts may be needed to align the car with the lowered ride height. It's not just swapping out the springs unless you don't care about your tire wear.

Les