Review on 🚗 K&N Cold Air Intake Kit: Boost Horsepower, 50-State Legal: Compatible with 2002-2005 CHEVROLET/OLDSMOBILE/GMC (TrailBlazer, Bravada, Envoy), Part 57-3036 by Richard Cuneo

Installed this weekend on my 2003 Envoy and am very pleased. There's a peak power increase, and there's at least a 1mpg increase, which is pretty big when you're only getting 15mpg to start. The best part is the sound it makes when you step on the gas and it really starts to suck in air. My old man said that in the 70's people would flip the top of their air filters to get that big car sound. I highly recommend this product.