Thanks mustangman!I just had the same kit put on my 07 GT, No problems. You do have to have an alignment. Almost anytime you lower a car the rear axle will shift. Mine did a little, less than a 1/4 inch. I am going to get an adjustable panhard bar to correct it but I called Eibach and they said does not effect driving or anything because it isn't enough to hurt anything. I used to sell cars, and I would look at your lease agreement to see if they have any stipulations against those type of modifications. I would say it does violate your lease but if you are planning to buy out the lease at the end of you term I wouldn't worry about it unless it violates any of your warranty with the lease. I would just do some research on the lease first.