I have the Hot juice and my rail pressure seems to be fine. But as soon as i stack it im sure it will need a better LP. I would think a modded FCA would improve more than higher pressure. Right?

What about the modded rail? how much of a gain is there from that? It seems like a good idea but anyone have testing to prove it?

 

Exaclty. Like Phil and Unbroken are saying, the only thing the dual feed line does is help with rail recovery. For the guy who is building a full blow racer or monster hp this helps prevent damage after a WOT run but other than that it won't help provide anymore fuel to your engine. I installed one one my last truck and the only improvement I saw was after a WOT run.