MBRP down pipe ....very happy
 

2012 cummins 6.7 dpf back exhaust and s&b intake..no tuner yet
In mass this state sucks for performance add ons or deletes so
I did a mbrp 4" down pipe delete cat must say best bang for your buck!
Not to noisie direct fit huge difference in performance fuel mpg gained 3-4 mpg
Easy install 45 min and yes I had to drop the trans cross member only pain was removing the sensors but lil time they can out. So just throwing it out to you guys running or trying to stay a little legal out there..:c: