remove the horizontal slats from the stock roof rack as well......
Just a little heads up, when my truck was bone stock, I got 21 mpg hwy and 19 city. Then I went to BFG AT's 265/75-16 my mileage dropped to 17 hwy 16 city adjusted. I'm planning on getting another set of wheels with street tread to see if I can increase my mileage....