There are alot of people who have done it. You need a dual system from a high level V6 or an R/T. If you have the black lower trim you need the lower bumper cover from a citadel one.

Just searching on the site i got 4 pages of threads about this...here are some

http://www.dodgedurango.net/forums/.../forums/durango-performance-2011/31090-thoughts-converting-v6-dual-exhaust.html
http://www.dodgedurango.net/forums/...discussions-2014/23444-correct-valence-single-dual-conversion-limited-trim.html
http://www.dodgedurango.net/forums/...cussions-2014/55905-dual-exhaust-2014-dd-limited-v6.html?highlight=dual+exhaust
http://www.dodgedurango.net/forums/...e-durango-how-tos/18489-upgrading-single-v6-exhaust-r-t-duals-part-numbers.html

 

I have a new 2017 R/T exhaust I’ll part with. I took it off to install the Corsa system when the vehicle only had <1,000 miles.

 

OK guys, sorry, found the thread with the exact info I needed. Feel free to add to this if you want. Thanks for the info!

http://www.dodgedurango.net/forums/...e-durango-how-tos/18489-upgrading-single-v6-exhaust-r-t-duals-part-numbers.html

 

Please note his is a 2011, yours is a 2015, the bumper parts will be different.