ive got a 2005 Lariat F150 4x4 with a 6 inch lift and 35s. as you can imagine i get pretty horrible gas mileage.. around 11 mpg to be exact.. and im wondering what chips would be reccomended for my style of truck to boost power or raise my gas mileage.

 

I would go for the cheapest used one you can find. Getting your tranny back on a good shift pattern with your larger tires should be the biggest benefit.