I did a Ppei delete with a air intake, 40hp upgrade, and I absolutely love it. After having a million and one problemside with the emissions, and weeks at the dealer their final solution was a new dpf which they said was $2500 not including labor so I said can I come get my truck, I called a diesel performance shop and $2000 dollars later I'm happy with no issues at all, I don't have a heavy foot at all so I'm getting like 35mpgs. And I'm happy