I'm not entirely sure, but I have a little note you you to consider and ask whoever is installing it. I considered this 3 inch level kit as well. If it isn't to late, IMO you might want to return it and just go with a 3 in kit like I will be.
The reason I say this... I called Firestone and as them if they would install a 3 in leveling kit. They said they will not do any leveling kits over 1.5 inches. Their explanation... "There isn't enough adjustments with a leveling kit to properly align the front end."
I don't know how much of this is true, if at all, but for about the same price I can get a 3 inch lift kit