OP
TOMLESCOEQUIP
Platinum Member
Just added an airaid filter & gutted the factory air silencer tube.......I'm going to a donaldson muffler like they use on the 5.9 in the medium duty trucks...........and see if that helps.........I'm getting about 15.9 after the computer reprogram at the dealer's (have'nt towed yet)............better than the 10-12mpg....... I was getting already........Tom
