New to the forums here but I have looked up everything and I can't find anything out. So here's my problem. I have a 2003 6.0 powerstroke. My stock turbo whistled like it should but then it went out so I put a turbo out of a 05 on it with the 03 exhaust housing because I didn't have a pedestal. After I did that it didn't whistle which I figured it wouldn't anyways then I decided to buy a powermax. The powermax turbo that I bought was from sinister diesel and it is the series 1 and Iv read everywheres that powermaxs whistle like the stock 03 turbos but mine doesn't. What could I do to get the whistle back?