When I had questions, the Supreme staff responded to my emails quickly. My local Ford dealer installed the product and built a completely different truck than the one I had. I chose the 2" kit after doing my homework and learning that anything taller is bad for ball joints. Before installing I had 37 inches from the floor to the bottom of the fender and 40 inches from the floor to the bottom of the rear fender. Now I'm 39 1/2. 40 front and rear. Looks great, enough room for tires in the future and I did it all for less than 450.00 including rental car, tuning and fitting. I can't say enough about the product and the people behind it.