We are all burning off range grass the last couple of weeks (controlled, and on purpose, no DPF involved

) and one of the local volunteer departments shows up with 2008 F350 4x4 brush rig, auto, pto option, bright red!!! Nice truck

.
Exhaust tip looked different. I crawl underneath. NO DPF!!! NO CAT!!!! They said it came that way! What the heck??? Mr. Firetruck builder take it off? Ford sells fire trucks with out them (they cause brush fire)??? How ironic would that be?
It sounds like a Detroit and a 747 mixed together. When they high-idle it for pumps it sounds like it is going to take off straight up.. Very cool. I want that.
What gives? Anyone see this also?
Also worthy of mention it had an alternate air intake that runs on outside of truck up the A-post and gets air at top of cab level. Wonder what other mods under that hood there be??? Arrrrrrrr