So I did a delete and tune and had the DPF and Cat removed after being stuck on the side of the road and visiting the dealer a few times. I just got tired of the headache. Now it runs like a scalded dog and gets 30mpg all day long. I LOVE IT. However with the new emissions warranty and update what is everyones opinion on reinstalling the factory cat and DPF and getting the update. Personally I don't want to ever have to deal with the DEF or DPF, but there are some downsides to it such as it will be harder to sell.