if your running a dmax pump your fuel pressure to the pump has to be set down to 8psi....i know if your running a fass they sell a different spring to regulate the pressure
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1997 Dodge Ram 3500 3k GSK, custom plate, New Era 435 Injectors,20*,AFC Mods,HE351/S474 Twins,ARP 12mm studs,Custom Cold Air,5" TBE Dual Exhaust,TCS Triple Disk,DTS Tranny, 35's,Leveled,Flex-a-lite fans
IN NEED OF 4 REAR TIRES