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 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.