Hi i just installed a K&N Air Intake for my 2006 Audi A3 2.0T Quattro.
Picture after installation: http://i42.tinypic.com/2yopqwj.jpg
I had already mapped my car to 242bhp, and have a Remus Power Sound exhaust installed.
Today after the install of the Air Intake my engine makes a strange sound at 4k RPM. Above it its fine, below it its fine. You can hear the sound on the youtube video.
I can not find any leaks in the pipes or connections.
Any idea what this might be? The car drives fine, and performs well as far as I can tell.
Thank you for your time.