I second what both of them said.
H&S Mini Maxx for a tuner and delete the DPF,NOX, Cat, and EGR and your engine will be a lot happier. You will pick up a few mpg and more power.
H&S has "overdrive" software for the transmission that will help prolong it's life.
I wouldn't waste your money on an intake. The stock intake and filter has been proven to be sufficient for up to about 500hp.
I've yet to see a dyno graph show any gains by replacing the intake.
2007 6.7 | EFI-Live | Draconian tuned TCM | T4 S366 | ARP | AFE | Fox | Carli