I know somebody who did, no boost creep. Jeff Carpenter sold this mod. The problem I had with it is it's LOUD. Also another problem is that if you chop it off the exhaust vapors go right on the oil filter. I didn't like this at all, I believe that it may have some adverse effects on oil temperature. The only way I would recommend doing it is weld a pipe to it, after this it was a lot quieter and the vapors escaped away from the oil filter.