I removed mine a week ago. I kinda liked the sounds but though it might be leaking boost. The highest I ever got previously was 25.81 PSI and now I get 26.06 max. A quarter pound exactly, coincidence? Perhaps. This was using the Whoosh silicon cap style delete. What surprised me is I don't miss the noise at all. I hear more turbo whistle than before but I also changed out the hotside charge pipe to a Whoosh so that maybe a contributing factor as well.