This one is only a filter back system. It is in red near the bottom of the page. I know some people have removed their DPF, but I have read some guys have had problems while others have not. A filter back and cat back is just as it sounds. I don't know if any company has come out with a cat back for the LMM. Once you start removing the emissions stuff on the truck it gets into a gray area if the dealer will still warranty it or at least give you a hard time about removing that stuff.
2016 GMC Sierra 2500HD Denali
Extang Blackmax Tonneau
Weathertech floor mats and mud flaps
X-pel clear bra
SOLD 2004 GMC Sierra LB7