[03LB7PPE]

I looked into this also. damn near took the turbo off my truck, no silencer ring. i got an 03 lb7. from what everyone i talked to said duramaxs dont have them, just quiet turbos. if you really wanna hear your turbo go to xdp.com and get the 3'' turbo downpipe (like $289). replaces the junk stock flat pos downpipe.