The Holley VR Series billet fuel pressure regulators are part of the VR1 and VR2 Series brushless fuel systems product line. These regulators can support 3000+ horsepower engines that require high volumes of fuel flow. Both EFI and carbureted versions can be referenced on a 1:1 ratio. They are precision machined from 6061-T6 billet aluminum for strength and durability and feature a black bright dip anodized body and a clear bright dip anodized top for corrosion resistance and good looks. Offered in 2 port and 4 port versions for carbureted or EFI pressures, Holley has the regulator to cover your needs! Features: EFI regulators are adjustable from 40-100 PSI base pressure Carbureted regulators are adjustable from 4 to 9 PSI base pressure Compatible with gasoline. Making Automotive Dreams a Reality. Mitsubishi Eclipse / Talon DSM. Mitsubishi Evo 8 / 9. Subaru BRZ / FR-S / GT-86. Holley VR Series Fuel Pressure Regulator Four Port Low Pressure 4 to 9 PSI. Features: EFI regulators are adjustable from 40-100 PSI base pressure Carbureted regulators are adjustable from 4 to 9 PSI base pressure Compatible with gasoline, methanol, and E85 Compatible with 1/8? NPT gauge port Designed for use with the Holley VR1 and VR2 Series Brushless in-line fuel pumps Can be referenced on a 1:1 ratio? Includes a barb fitting and a -4 AN fitting for reference connection 2 port regulators feature a 10 AN O-ring inlet/outlet and return 4 port regulators feature a 10 AN O-ring inlet and return with (4) 8 AN O-ring outlets Specs: Brand: Holley Color: Black Anodized Emission Code: 5 Fuel System: Carbureted Fuel Type: Gasoline / Ethanol / Methanol / E85 Material: Aluminum Pressure Range: 4-9 PSI Product Type: 4 Port Fuel Pressure Regulator Return Size: 8 AN O-Ring Part Number: 12-865. Questions about this item? International Buyers – Please Note. We welcome your inquiry!