Im leveled with 35's now and I'm wanting to go up to a 6" BDS and run 37's, I need some advice from someone who has this set up already. My truck is an Ecoboost and right now it's tuned by Torrie at Unleashed Tuning, I know running 37's I'm gonna lose mileage but I'm terribly afraid it's gonna go down to 13-14 and I dont think Torrie could help get me back where I am now. So any help with my issue would be appreciated before I drop $6k on this lift and tires.

 

I have a '15 on a BDS 6" with 35's and had to trim the inner fenders due to rubbing...I'm sure they're going to rub even more so with 37's. I added a SuperChip programmer and tuned the tire size to 34.5" and get the mileage on point. Averaging 15 mpg on regular gas and the 5.0 motor.