I've got a 2006 6.0 350 with stock exhaust and am wanting to either delete the cat or the muffler, but not both. I'm curious if anyone can tell me how each would sound? For example, would deleting the cat make it louder than deleting the muffler, or will one make the turbo whine more audible than the other? Also, is there any benefit to deleting one over the other, performance wise? Thanks for the help. Oh, I'm not really looking for loud and obnoxious, but more turbo whine wouldn't be too bad .

 

I vote muffler delete. The muffler can easily be replaced if you don't like it or you need to have it for other reasons. The cat on the other hand is very expensive to replace, and removing it somethings causes problems with the turbo.

 

Thanks for the information. If I just delete the muffler, is it going to be a drastic change as far as volume and inside the cab drone? Not looking to make long trips too overwhelming. Thanks.