A Little more than 2 inches on the front and then i did 1.5 in the rear simply because of the 650lbs X 9 inch - if i went 650lbs X 11 then I could lower it 3"
i would have to look at the fronts to get you the stats but the alignment guy brought it up to get it to spec and I have done well on tire wear after being lowered at 300 miles and now have 71,000
good luck on the turbo -