The reason for two regulators is that the primary one for the carb can be set to 6 to 8 psi while the secondary nitrous fuel-enrichment regulator is set to 10 to 12 psi to get the extra fuel to ...

Instead, an electronic regulator is integrated with the fuel-pump assembly located in the fuel tank. This makes it difficult to manipulate fuel pressure in the presence of nitrous oxide.

One nitrous line runs inside an A/C vacuum line that goes to the bottom of the intake. The other went out the vacuum port labeled "B/R" and into a vacuum hose that ran to the fuel-pressure regulator.

Several years ago, we installed a Nitrous Works adjustable EFI kit on one of our resident 5.0 Mustangs. The kit worked well but required a separate fuel pressure regulator that had to be adjusted ...