Hello, I wanted to know if an experience with closed open air filter kit ́s has already done. I have the problem that I have a K&N Typhoon Kit with TÜV, had it built in for a short time, made a test drive and threw the thing out right away, because it was really so loud that you hardly understood your own word any more. I am looking for something that might be closed like the Tenzo Type-R CDA.