Wayne
Active member
Just picked up a totally stock '03 excursion running a V10, 4r100 trans, 4X4, and 3.73's that I'd like to mod for better fuel economy until I get around to the 6.4 conversion I have planned for it in a year or so. I have a buddy who did a superchips microtuner and 4" cat back system, and seemed to pick up a decent amount several years back. That's the only experiment I've helped with, and would like some relatively inexpensive recommendations. Thanks in advance.