Review on Enhanced Performance: Universal Adjustable EFI Aluminum Fuel Pressure Regulator Kit with Gauge & Fuel Line Fittings (Black) by Brandon Boones

Gauge shows fuel pressure but it's 10 pounds off. Even if you increase the throttle, the device will not increase the fuel pressure when the vacuum line is connected. The block must allow fuel pressure to rise when the vehicle is under load. The lines feel very cheap, but for the money you expect. The block itself, apart from the fact that it can't control the increase in vacuum, appears to be well built and the fitting works well and doesn't leak.