Description APD 4 Port Regulator : Non Blow Through
Designed for use with our Pro/Elite/Ultra Elite Boost best drive pumps, or similar style pumps in a carbureted application.
-8AN inlet and outlet ports with a -6AN gauge port.
Boost reference port is tapped 1/8 NPT and can be used with push lock or AN style fittings.
Regulator model #706021 is designed for use with our Pro Boost pump.
Model #706023 is designed for use with the Elite & Ultra Elite series pumps and utilizes dual return lines allowing lower idle fuel pressure and boost reference capable over 1:1 at wide open.