Review on K&N Cold Air Intake Kit for Hummer H2 6.0/6.2L V8: Increased Horsepower Guaranteed + 50-State Legal (2003-2009, Model: 57-3037) by Ronald Ingram

Why have I waited all these years?!?! I love it! After installation, I did a 63-mile test drive combined with city and highway driving. The trip meter recorded an average of 12.6 MGP, which is higher than my average of 10.4 MGP. That's an improvement of 20%. Now I can drive longer on one tank of fuel. When I removed the factory hose at the throttle body, I immediately realized that the factory air intake was installed incorrectly from the start in 2003! See photo. I highly recommend doing a simple check to make sure the gasket is good and the air filter is doing its job. It was also a great prize from Revain on Cyber Monday with a performance discount.