I bought mine from C Sean Watts in Raleigh, NC and set them up myself. I do have a Bosch pressure tester but they were fine and did not need anything after assembly. If you have them do one at a time and you should be ok but that is just my .02. Keep things clean or they will leak.

Good Luck
Robert

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84 300SD 84 300CD 85 300SD 85 300CD 98.5 Dodge 2500 Cummins 99 Dodge 2500 Cummins 90 Jeep for the sand Wilmington, NC