Quote Originally Posted by Fendt1042 View Post
Thanks! I thought they had one behind the filter. Damn I guess I never crawled under and checked

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Nope, no need for it. The turbo, SCR, and DPF do an exceptional job of reducing exhaust noise. A muffler would just add unneeded weight.

I might be wrong, but I do believe that the DPF back pieces require cutting the stock tailpipe off, but don't quote me on that.