I have a 2005 Red H2 Sut, it has 90.000 miles on it but in good shape, I want to install new exhaust (would like recommendations) want a programmer and I am considering a blower, any thoughts? Would any of these help gas mileage? Not a big deal just wondering.

 

I installed a new B&B cat back exhaust, new K&N intake system and also a Superchips programer on my personal 2003 Hummer H2. All helped with performance but I have yet to see more MPG from them. I am sure they do help with MPG but with all that extra power I just put my foot into it even more so no more MPG gain. I did add a Magnacharger supercharger to my H2 and it made a night and day difference in performance and driveability. I did get better MPG oncee the supercharger was installed, towing my boat went from 12.9 to 14.00 on a trip to LA and back. The only problem I have now is slowing down!