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Holley 12-842

Billet Adjustable Regulator

Holley 12-842
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Holley 12-842 Billet Adjustable Regulator $112.95
Billet Adjustable Regulator
  • Carbureted Applications
  • Bypass Style With Idle Bleed
  • Adjustable 4.5-9 PSI
  • 3/8" NPT Ports

  • Holley 12-842 Details

    HP Series Regulators

  • Used in systems with a return line back to tank
  • For use with high flow mechanical or belt drive pumps
  • Adjustable from 4.5-9 PSI for precise fuel pressure adjustments
  • Utilizes an idle bleed for precise control of idle pressure
  • One inlet, one outlet, one return (or bypass)

  • Specifications:

    Mounting Bracket Included
    Fittings Included
    Boost/Vacuum Reference Port
    Gauge Port
    Inlet Attachment
    Female Threads
    Outlet Attachment
    Female Threads
    Pressure Range (psi)
    Sold individually
    Regulator Finish
    Black/Clear anodized
    Regulator Location
    Regulator Material
    Billet aluminum
    Regulator Style
    Return Attachment
    Female Threads
    Return Fitting Size (in.)
    3/8 NPT
    Inlet Size (in.)
    3/8 NPT
    Outlet Size (in.)
    3/8 NPT
    Outlet Quantity
    Inlet Quantity
    Manufacturer's Part Number:

    Holley 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 & 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 & VR 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.

  • 12-842 - Holley Billet Fuel Pressure Regulators is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Bullet fuel regulator Purchased the bullet regulator with return paired with a black pump. Nice compact regulator for ease in placement. Return unit aids in relieving pump which now is tremendously quieter than prior black pump with regulator without return.
    Date published: 2015-06-18
    • y_2017, m_9, d_20, h_3
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
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    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_1617519, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
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