No its not, my buddy has one on his 04.5 and the only time you hear it is when you turn the key on and it primes the pump, after that you cant hear it over the truck.
Yes I only hear my HPFP when I prime the system...other then that it is not too bad. But airdog is very quiet too.The new FASS pumps are quiter now.
That is a personal call since the biggest advantage of the AD150 is the added fuel filtration and water separation. Personally if you have the cash I would go for the AirDog but if not then a pf7977 in the canister and a bigger w/s on a FB3111 base with a 10 to 6 JIC o-ring fitting with some push locks will help you out.Would I have to get the air dog 150 or would the raptor 150 be fine??