Reviewed By Eric H (East Wenatchee, WA) Reviewed for a 2003 Hummer H2 —12/21/2013 11:40 AM
Hardly any noise heard with the stock intake.
Reviewed By Steven C (Oceanside, CA) Reviewed for a 2004 Hummer H2 —8/17/2010 6:53 AM
Easy to install. No idea about any extra HP or gas milage. I have only been doing short city driving. My commute to work is no more than 10 miles a day. I will have to wait a bit until I can make a decent highway trip to see if my milage improves. Overall, I am satisfied.
Reviewed By George Y (Angleton, TX) Reviewed for a 2008 Hummer H2 —2/9/2010 10:59 PM
Received the spacer in a few short days. Well designed and fits to the intake perfectly. No whistling noise heard when running. Power increase wasn't pronounced but that would need a dyno test before-and-after installation for measurement. Spacer is used in combination with cold-air intake and cat-back exhaust. Together made major improvement in acceleration.