Not sure which 2008 Hummer H3 Air Intake Systems are right for you? We have over 20796 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Noticed an immediate increase in power specifically in mid to hi range rpm. Overall fuel economy had a very slight increase (maybe 1/2 to 1 mpg better) if you keep your foot out of the pedal which i normally do not. I also added a Jet Performance stage 1 with this K&N. Both together added more overall power when needed and getting about 2 to 3 mpg better." —Scott S from Delaware, OH bought a K&N 63 Series AirCharger High-Flow Intake Kit for a 2008 Hummer H3, 3.7L 5-cyl. engine.