So I was looking for more power and better mpg on my 6.7 so I went out and have just added the H&S Performance Black Maxx shift on the fly tuning, and H&S Turbo back 5in exhaust, H&S EGR and cooler delete with a k&N Air filter!

So far the outcome has been great, running 33" tires i'm getting around 18-19mpg now as to where i was getting 12-13mpg!

The power is...well i'll just say it'll put all my passengers back in their seat! It'll much much more power!