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Holley Billet Fuel Pressure Regulators


Holley
Holley Billet Fuel Pressure Regulators

Product images may differ from actual product appearance.

Holley HP, Dominator and Ultra Series Billet Fuel Pressure Regulators are part of a complete line of fuel system products. They are precision machined from 6061-T6 billet aluminum for strength and durability. They feature a black bright dip anodized body and a clear bright dip anodized top for corrosion resistance. Holley Billet Fuel Pressure Regulators are available in a variety of configurations.

HP And Dominator Series
  • Demand and return style regulators available.
  • CNC machined from 6061-T6 billet aluminum for strength.
  • Black bright dip anodized body and a clear bright dip anodized top for corrosion resistance and good looks.
  • All regulators feature a 1/8" NPT gauge port.
  • Carbureted and EFI versions available.
  • All regulators include a mounting bracket for easy installation.

    Ultra HP And Dominator Series
  • Can support 3,000+ HP engine applications that require high flow fuel volumes.
  • 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* (*requires draining and flushing after each race).
  • 1/8" NPT gauge port.
  • Designed for use with the Holley Ultra HP and Ultra Dominator 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.


  • 20 Products

    HP Series Regulators

    Holley 12-840 - Holley Billet Fuel Pressure Regulators
    510-12-840
    Billet Adjustable Regulator
  • Carbureted Applications
  • Adjustable 4.5-9PSI
  • 3/8" NPT Ports
  • FREE
    SHIPPING
    & HANDLING!
    $87.07
    Order Today Ships 05/31/16
    Holley 12-841 - Holley Billet Fuel Pressure Regulators
    510-12-841
    Billet Adjustable Regulator
  • Carbureted Applications
  • Bypass Style
  • Adjustable 4.5-9PSI
  • 3/8" NPT Ports
  • FREE
    SHIPPING
    & HANDLING!
    $97.34
    Order Today Ships 05/31/16
    Holley 12-842 - Holley Billet Fuel Pressure Regulators
    510-12-842
    Billet Adjustable Regulator
  • Carbureted Applications
  • Bypass Style W/Idle Bleed
  • Adjustable 4.5-9PSI
  • 3/8" NPT Ports
  • FREE
    SHIPPING
    & HANDLING!
    $109.95
    Order Today Ships 05/31/16
    Holley 12-843 - Holley Billet Fuel Pressure Regulators
    510-12-843
    Billet Adjustable Regulator
  • Carbureted Applications
  • Adjustable 4.5-9PSI
  • (1) -10AN O-Ring Inlet, (2) -8AN O-Ring Outlets
  • FREE
    SHIPPING
    & HANDLING!
    $130.95
    Order Today Ships 05/31/16
    Holley 12-845 - Holley Billet Fuel Pressure Regulators
    510-12-845
    Billet Adjustable Regulator
  • Carbureted Applications
  • Bypass Style
  • Adjustable 4.5-9PSI
  • (1) -8AN O-Ring Inlet, (1) -8AN O-Ring Outlets, (1) -6AN O-Ring Return
  • FREE
    SHIPPING
    & HANDLING!
    $157.95
    Order Today Ships 05/31/16
    Holley 12-846 - Holley Billet Fuel Pressure Regulators
    510-12-846
    Billet Adjustable Regulator
  • EFI Applications
  • Bypass Style
  • Adjustable 40-70PSI
  • (1) -8AN O-Ring Inlet, (1) -8AN O-Ring Outlets, (1) -6AN O-Ring Return
  • FREE
    SHIPPING
    & HANDLING!
    $157.95
    Order Today Ships 05/31/16

    Dominator Series Regulators

    Holley 12-847 - Holley Billet Fuel Pressure Regulators
    510-12-847
    Billet Adjustable Regulator
  • Carbureted Applications
  • Bypass Style
  • Adjustable 4.5-9PSI
  • (1) -10AN O-Ring Inlet, (1) -10AN O-Ring Outlets, (1) -8AN O-Ring Return
  • FREE
    SHIPPING
    & HANDLING!
    $163.95
    Order Today Ships 06/23/16
    Holley 12-848 - Holley Billet Fuel Pressure Regulators
    510-12-848
    Billet Adjustable Regulator
  • EFI Applications
  • Bypass Style
  • Adjustable 40-70PSI
  • (1) -10AN O-Ring Inlet, (1) -10AN O-Ring Outlets, (1) -8AN O-Ring Return
  • FREE
    SHIPPING
    & HANDLING!
    $163.95
    Order Today Ships 05/31/16

    Ultra Dominator Series Regulators

    Holley 12-851 - Holley Billet Fuel Pressure Regulators
    510-12-851
    Ultra Dominator Fuel Pressure Regulator
  • 2-Port
  • Adjustable, High Pressure 40 To 100 PSI
  • Boost Reference 1:1
  • 10 AN O-Ring Inlet/Outlet And Return
  • FREE
    SHIPPING
    & HANDLING!
    $229.95
    Order Today Ships 06/08/16
    Holley 12-852 - Holley Billet Fuel Pressure Regulators
    510-12-852
    Ultra Dominator Fuel Pressure Regulator
  • 2-Port
  • Low Pressure 4 To 9 PSI
  • Boost Reference 1:1
  • 10 AN O-Ring Inlet/Outlet And Return
  • FREE
    SHIPPING
    & HANDLING!
    $219.95
    Order Today Ships 06/08/16
    Holley 12-864 - Holley Billet Fuel Pressure Regulators
    510-12-864
    Ultra Dominator Fuel Pressure Regulator
  • 4-Port
  • Adjustable, High Pressure 40 To 100 PSI
  • Boost Reference 1:1
  • 10 AN O-Ring Inlet And Return With (4) 8 AN O-Ring Outlets
  • FREE
    SHIPPING
    & HANDLING!
    $239.95
    Order Today Ships 06/08/16
    Holley 12-865 - Holley Billet Fuel Pressure Regulators
    510-12-865
    Ultra Dominator 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
  • FREE
    SHIPPING
    & HANDLING!
    $229.95
    Ships

    Billet Regulator Rebuild Kits

    Holley 12-822 - Holley Billet Fuel Pressure Regulators
    510-12-822
    Regulator Rebuild Kit
  • For 510-12-840
  • $22.50
    Ships
    Holley 12-823 - Holley Billet Fuel Pressure Regulators
    510-12-823
    Regulator Rebuild Kit
  • For 510-12-841 and 510-12-842
  • $22.50
    Ships
    Holley 12-824 - Holley Billet Fuel Pressure Regulators
    510-12-824
    Regulator Rebuild Kit
  • For 510-12-843
  • $22.50
    Ships
    Holley 12-825 - Holley Billet Fuel Pressure Regulators
    510-12-825
    Regulator Rebuild Kit
  • For 510-12-845 and 510-12-847
  • $31.72
    Ships
    Holley 12-826 - Holley Billet Fuel Pressure Regulators
    510-12-826
    Regulator Rebuild Kit
  • For 510-12-846
  • $31.72
    Ships
    Holley 12-827 - Holley Billet Fuel Pressure Regulators
    510-12-827
    Regulator Rebuild Kit
  • For 510-12-840
  • $31.72
    Ships
    Holley 12-866 - Holley Billet Fuel Pressure Regulators
    510-12-866
    Regulator Rebuild Kit
  • For 2/4-Port Ultra Dominator Fuel Pressure Regulators
  • Low Pressure 4 To 9 PSI
  • $29.95
    Order Today Ships 06/08/16
    Holley 12-867 - Holley Billet Fuel Pressure Regulators
    510-12-867
    Regulator Rebuild Kit
  • For 2/4-Port Ultra Dominator Fuel Pressure Regulators
  • High Pressure 40 To 100 PSI
  • $44.95
    Order Today Ships 06/08/16

    20 Products