[mrchrishall]

I think that as others have said "in theory". exhaust, CAI etc SHOULD improve gas mileage, unfortunately when you gotta put the foot down all theories go down the drain. If you want a sure fire way to get better MPG, do the "gas pedal mod" it involves finding a nice short piece of 2 x 4 and placing it under the pedal on the right side of the truck, for even better imporvement, change 2 x 4 to 4 x 4. Works wonders!