Ok, i have a 2004 sentra spec-v, and im about to hook up a 50 shot of nitrous to the system. but i read in the FSM that the fuel pressure regulator is in the in-tank setup, and i need a vaccum line from this to go to my nitrous pressure regulator. my question is that i want to upgrade to an adjustable fuel regulator closer to the motor, and i was wondering if i have to remove this unit before hooking the new one up. is there any downside to running both regulators or is they going to counteract each other. any insight will be greatly appreciated.