I've seen the size of that supply line and it's barely 1/4"
It designed to provide more back pressure for the fuel pump so it can maintain fuel pressure which provides a siphon effect for the drivers side fuel tank. It's not a high volume supply system and unfortunately requires back pressure to even work properly
I played with the fuel pump one day and discovered a few things that to this day, still freak me out a bit.
That's some of a few reasons that I recommend upgrading the entire fuel supply system when boosting the VHR. I've seen things that are not pretty lol
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[B]2009 & 2017 370Z Touring Sport Autos SOLD
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