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Message: [QUOTE="Buffalo444, post: 258969, member: 1303"] Why do I keep seeing Fuelab 51501-1 show up for the FPR to use in a regulated return system? Here's what I'm gaining from my research... Fuelab 51501-1 is an inline FPR, with one -10AN inlet and a -6AN return, which would be fine if the return lines from the head joined in a -6AN dual Y to -10AN single. The way I suppose this works is because the pressures in each head are allowed to stabilize before having to overcome the spring pressure of the regulator. The one I see on Fuelab's site that I *want* to use is the 51502-C regulator, which has 2 -6AN inlets and a -6AN return. The reason I want to use this I because it would eliminate the need for a Y fitting from the return lines to the head, thus eliminating a potential leak.... the only reason I worry is because it possibly wouldn't let the fuel pressures in each fuel rail to stabilize, allowing one rail to open the regulator and not allow the other to maintain adequate pressure? I am unsure though... Any input? They are both priced the same so if you could use one less part I dont see why you wouldnt.... [/QUOTE]

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