I have an 08 F-350 6.4 with a AFE Cold Air Intake, H&S mini Max tuner, and DPF delete and the EGR Block off plates. I have been looking on line as to things that people sugest, that a owner of a 6.4. The two things that I found the most of was that, the powerstroke was cast in sand and that the sand leaches out over time, so I need to filter the coolant, also I found that the factory fuel system lets way to much air in to the injectors, which cause the ECU to retard the timing, so I want to put in a better on frame rail fuel pump/ system that has two filters on it, one a water seperator and a 2 micron filter on it. As I was draining my water seperator valve last Saturday and the plastice POS lever broke in the open postion, so I managed to get the valve shut. Had to wait tell Tuesday to got to the Dealership to see about getting the part that I needed to fix my Ford. At the dealership they printed out the diagram of the water seperator and I showed them what I needed, and they said that is was a special order item, there were ways that I could of fixed the part that was broken, one part was a $40.00 fix the other was $140.00 part, and guess what they didn't have either one instock, come on Ford, you sell diesel trucks, surely you should have at least one of the two parts instock, they are not very big at all. Luckly another dealer in town had the part thay would get my Ford up and running again, but it was the $140 part. So after instaled the part and crancked up the Ford, I was thinking if that dam POS lever breaks again I will be out again $40 to $140 each time it breaks, and I am a stickler about maintanice so I don't want to have this issues every again. So any input on good filter kits for the coolant and fuel. Thanks, as I plan to have this truck for along time, so I want to protect it now, and hope that it will last.