Reviewed By Ira C (Ball Ground, GA) Reviewed for a 2007 GMC Yukon XL —11/9/2013 12:50 PM
Vortec 6.0 in a Yukon XL 2500 4x4. Installation was not bad EXCEPT the tube needs to go in the opposite sequence. Attach to the throttle body FIRST, THEN attach to the air box, with the round (two screw-secured) insert loose. I also had to trim the edge of the fan shroud about an inch to clear it. The performance is obvious when you tromp the gas. I do not yet have mileage numbers, but I know if I keep my foot out of it, there will be an improvement. Worth the money for just the sound!