Review on 🚀 High Performance K&N Cold Air Intake Kit: Increase Horsepower for 2003-2004 CHEVROLET/GMC (TrailBlazer, Envoy) 57-3048 - 50-State Legal by Matthew Thorndike

Received this FIPK Gen 2 yesterday and immediately installed it in my 2004 5.3L EXT. The fixture was a bit tight at about 1/8 inch from the radiator fan to the pipe, but as long as you tighten everything it won't hit. The only thing I can recommend K&N is to make the hole on the body a bit smaller or add some foam, the gap is actually quite big, that's the only thing that makes me take the sprocket off. Also the picture that Revain used shows filters on the wrong side of the case. Actually it's their fault because that's K&N's. I'll take a picture and upload it after work. The sound it adds is definitely aggressive when you step on it, but at cruising speed or when accelerating slightly to save fuel you don't really notice a difference from the stock. The truck feels a little livelier now. I can't say much about the overall mileage increase since I've driven it less than 20 miles, but I'll update later when I break it in (assuming I can avoid hitting the gas pedal the whole time to hearing that deep growl).