I took just the piece of plastic that goes from the airbox to the fender (about3-4 inches long) right off, it only took about thirty seconds, and it sounded really nice at about 4,000 rpm's, but I put it back on because I don't know if this is good for the car. If it's not a bad thing, it should be a really nice alternative to taking the actual resonator out of the fender, because this is really fast and easy. Also it is extremely easy to put back on. confused