But I've always heard everybody preach on FASS, is there much difference in performance and quality? And what's this thing people are talkin about, about tappin a line if you go over a certain power level?

FASS are good but AirDog is just as good if not better, cheaper and they are the Official Fuel Pump Of Diesel Bombers. it comes with a lifetime warranty too.....

To make power on the VP44 (98.5-02) trucks you have to use a box that taps the pump wire. Most of the time this voids your warranty but I believe it will not on the Blue Chip Pump. I still prefer the FASS but with the Lifetime Warranty and Price of the Airdog its kinda hard to beat.

If you use the stealth cover to tap it I know Bluechip and MWFI will still guarantee it for a year.