Just got a FASS 150 fuel system installed on my truck last week, and the pump is very loud. I can hear it over the truck idling, and my truck has full deletes. Truck was primed twice before, and just did it again, and pump is still as loud. Can hear it casually driving with the radio down. Remembered hearing something about a FASS quiet mod? Are these pumps supposed to be ungodly loud? Definately made a difference as far as keeping my rails happy, get no dip in rail pressure at hard throttle, as well as pulling grades etc.