Holley 12-851 2 Port VR Series Fuel Pressure Regulator, 40 to 100 PSI. 2-PORT VR SERIES EFI REGULATOR 40-100 P. Two Port Adjustable 40 to 100 PSI Boost Reference 1:1. The Holley VR Series billet fuel pressure regulators are part of the VR1 and VR2 Series brushless fuel pump systems product line. These regulators can […]