The verdict is in. I worked on the pump last night. First I placed a piece of rubber between the pump and where it was touching the sheet metal. This seemed to help a little but not much. I proceeded with the 5 gallon bucket test in attempt to detect blockage between the tank and pump. The pump was just as loud when isolated. I had lost hope but then it dawned on me to do the bucket test with the pump dismounted from the bracket. This made a noticeable reduction in noise. I took a can of rubberized undercoating and sprayed the inside of the bracket and the bed sheet metal where the pump was touching and where the bracket mounts. I also placed strips of rubber around the pump and between the pump and the sheet metal. Lastly I placed rubber boots on the mounting bolts. After all of this, it seems to be noticeably quieter although still louder than FASS pumps owned by friends, but more tolerable.
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2000 Quad Cab Short Bed, Black, 5 Spd., Tint, Silencer Ring MIA, 4" Exhaust w/ 5" Tip, Muffler & Cat MIA, 34 PSI Boost, FASS 95, Fuel, Pyro, Boost Guages, Eagle Alloys w/ 33x12.50 Mud Terrains, AFE BHAF, Qaud XZT+ Aggressive Tune, Sport Conversion