Review on K&N Cold Air Intake Kit for 2004-2006 Chevy/GMC/Hummer (Colorado, Canyon, H3) 3.5L L5 - High Performance, Increased Horsepower, 50-State Legal (Part Number: 57-3043) by Matthew Nunez

Great guide, easy to install. However, I removed it today March 23, 2018 after having it on my Hummer H-3 for 10 months. I kept having issues with the mass air flow sensor turning off the code and putting the car into emergency mode. This release prompted the Hummer to sell this week when I told a buyer about previous releases. If I hadn't had a scan tool in my car when the code was triggered I would have been the unhappiest camper. It is not worth risking this technique and facing this problem. I've had KN filters in the past with no problems and good results. But not at this point.