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 Lisa C (Lyons, NY) Reviewed for a 2003 Hummer H2 —12/1/2010 8:06 AM
Took less than 5 mins to install, very easy and no fuss! It doesn't make that high pitch whistle sound like the other spacers on the market which is good. I feel more power mid range but not sure about gas consumption yet as its only been installed for a week. Overall its a good buy and a nice upgrade for my H3's 3.7L I5 engine.
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.