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[fireguywtc]

I am a firefighter by trade and this is the first time I have heard of any factory altered 08's. However I can see how they would exempt a truck designated for wildland fire use. I wouldn't be a concerned about the DPF &regen mode starting a back fire, we could put that out. I would never want one of those things going into regen mode while I am parked with grass/brush underneath it. Chiefs don't like it when you tell them you burned up a 75k truck + equipment. I have seen vehicles burned up from exhaust starting fires underneath them, I imagine the 1100 deg would guarantee one. I am guessing the fire dept. or firetruck builder that speced the truck out was thinking ahaead and had all the exhaust emissions removed and regen stuff turned off. Thats good thinking and I will have to bring it up when we spec out some new brush trucks seeing how these emmision requirements are a reality from now on.

As for the air intake my best guess is they are just trying to keep it as high as possible to keep it out of the smoke/dust. Smoke lacks the O2 and can choke your engine out in the heat of battle. We also have to change out the filters on our 2000 7.3 brush trucks after almost every grass fire because they get so caked up with the black soot they can't even be blown out.

Bill