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12-865 VR Series Fuel Pressure Regulator
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HOLLEYPART NUMBER: 510-12-865

12-865 VR Series Fuel Pressure Regulator

$42595
ShippingShips on Sep 04, 2026
Lowest PriceLowest Price Guarantee

VR Series Regulators
VR Series Fuel Pressure Regulator
  • 4-Port
  • Low Pressure 4 To 9 PSI
  • Boost Reference 1:1
  • 10 AN O-Ring Inlet And Return With (4) 8 AN O-Ring Outlets

    Holley 12-865 Features:

    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!
    • 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

    Emissions Note:

    This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

    CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    • Precision-Built Fuel Pressure Regulators For EFI and Carburetors

      Holley Billet Fuel Pressure Regulators are available in a variety of configurations and engineered to provide smooth and stable fuel pressure delivery under any conditions from idle to full throttle. Each precision-machined, 6061-T6 billet aluminum regulator features an anodized body and top for corrosion resistance and durable performance.

    Part TypeFuel Pressure Regulator
    Product LineHolley Billet Fuel Pressure Regulators
    BrandHOLLEY
    Package Height3.2
    Package Width3.4
    Package Length6.0
    Weight1.44 PG
    Part CategoryPerformance Parts
    Regulator FinishBlack/Clear anodized
    Outlet Size-8 AN O-ring
    Inlet Size-10 AN O-ring
    Boost/Vacuum Rise Ratio1:01
    Regulator MaterialBillet aluminum
    Outlet QuantityFour
    QuantitySold individually
    Boost/Vacuum Reference PortYes
    RebuildableYes
    Mounting Bracket IncludedYes
    Gauge PortYes
    Return Fitting Size-8 AN O-ring
    Regulator LocationInline
    Fittings IncludedNo
    Inlet QuantityOne
    Pressure Range (Psi)4-9
    Part FitmentUniversal
    Regulator StyleReturn
    Vendor Part Number12-865
    Package Qty1
    Package TypeEA
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