I really don't see the point in those as the system relies on high pressure when using solenoids etc. The oe systems on all fuel injected installations use crimp and pipe fittings due to the higher pressures involved. These after market jobbies just use push on hose and jubilee clips.
Fuel pressure regulators of that design shown are only best suited to carburretor engined cars, I don't see what advantage they would offer only to add another bit of bling to an already blinged engine bay. I still have a fuel regualtor in my garage, a Malpassi Filter King when I was running twin 48's.
I see some muppet has been bidding on the electric supercharger too
