Hey KLM Performance Guys!
Sorry been busy with work, but here is my FASS update now that I installed the FASS HD D07 150G:
1) 3/4-1 MPG Increase (When my foot's not into it like it's stolen

2) Much Better Throttle response - less effort and the truck really moves
3) Runs smoother - quieter at idle and when I am cruising
So.......................a great buy in my eyes.
I did drain the FASS Water Separator after about 2K clicks, and was very surprised at how much water was there, damn shame batches of fuel are so unpredictable, but I guess this will also be my safeguard, as I go state-to-state 2-3 times a week. It should really help when winter comes as well, no more freeze ups!
Got a couple more exterior mods to do, then I'll be sure and send you some pictures.
Seems the H&S XRT stuff is getting a lot of good responses, what is your input here? I know you are running that system on your 6.7 due to very bad luck with the other stuff on the market. Fuel mileage seems to priority, with this in mind what are you getting with your H&S XRT (Towing and Non)?? Of course I like to drop the hammer sometimes, what can I expect here with my FASS system in place?
This might be the next KLM Performance upgrade.
Thanks again for your help!
DMD