Just curious what to do first, intake or exhaust?
I'mlooking at power gains and milage, sound and looks are secondary.
I plan on both but only have the cash for one at a time and curious what has the bigger milage and power gain?

 

Intake. im not big on the exhaust on the hummer cause the ones i have heard sound like a weed wacker. They are both going to let it breath better but i would do the intake first

 

cool. thats kinda what I was leaning towards anyway.
I'm looking at magnaflow on exhaust since they use a resonator and a muffler, that should keep it pretty quiet.

 

intake for sure and maybe a throttle body spacer made a big diff. in my H3 i love it. Im running the K&N.

 

What kind of milage gain did you see?

 

nothing wild just runs alot better on the highway, but i didnt drop any. made it sound right bad ***. but if anything i gained maybe 5km for HWY and nothing in town haha

 

do an intake.

http://www.airdocintakes.com/

Throttle body spacer = snake oil, save your money

mpg's most likely won't change but performance will

 

yeah I know on the spacer.
not sold on the airdoc. leaning towards the volant power core.

 

Well I can only speak from experience and the Airdoc is a great product. If you do some searching around on other forums you will read many many good reviews.
Also do some research about Doc and you will learn he knows his **** and has been around engines for years. I liked the fact that it was designed by someone that actually drives a Hummer and uses his Hummer for its intended purpose.
I have read good things about the Volant, but I could not justify the $$ difference for something that is basically giving you the same end result. Closed airbox with less restrictive airflow to the throttle body. Just my two cents

 

Yeah I've seen nothing but good things about him and I do know he's a member of the community and a hummer owner.

but what I know of the donaldson powercore filter makes me really want to try it.