Nitrous Express Fuel Pressure Regulator Non-Bypass w/Gauge

First off, the little gauge is at 4 psi with no pressure at all not even connected, and then my fuel pump was crazy and pumped massive pressure that somehow overpowered the regulator. Holley has sent me a new pump. Hopefully it did not ruin this regulator. I ended up buying a pressure gauge and isolator so I could moniter pressure from inside while racing. A good idea

Looks like the threaded port for the supplied fuel gauge on mine wasnt tapped correct. It went aproxamently one tread to deep. This cause erractic fuel pressures at first, then a complete failure. My system runs 78psi line, so a broken diaphram can be a very heroin experience. Fuel sprayed out of the atmospheric port like a 25# injector! I tried two other gauges with verring depths. Probablly a fluke, but when my replacement comes, ill take off the hat and verify clearance.