2003 Cummins engine whine @2000+ RPM's ( Solved/Muffler?)

Stop the press, found the problem!! Everyone was tell me to focus on the turbo CAC. That what it was, the coupling on the CAC to the long turbo outlet pipe. The clamp was hand tight. Tightened it up and noise is gone. I can't believe that much noise came from that turbo leak. I will inspect the muffler while I have it out. Has anyone gone to a straight pipe instead of muffler? With the muffler out, it doesn't seam that loud. Thanks for all the help, I was getting ready yo pull the belt tensioner!