Fass/AirDog
You wouldnt want to run a superior pump in front of an inferior pump. Keeping the stock unit would just hinder the AirDog.
The filters used on the AirDog are industry standard units. You can find Fleet Guard replacements at just about any truck stop or diesel supply shop. Keep in mind that you wont need to replace the water separation filter but about every 5 years unless you get a lot of trashy fuel in your area.
OHHhhhh thats right...Aaron told me you couldnt read and just looked at the pictures. Should I post up a pic for ya?

Suckup








