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Holley HP Billet Fuel Pressure Regulators 12-841 Regulators, Billet, Low Pressure, 4.5 to 9 psi, Return Style, 3/8 in. NPT, Inlet and Outlet, Black Finish, Bracket, Each

SKU: HLY12-841

Fuel Pressure Regulators

Holley HP Billet Fuel Pressure Regulators 12-841 Regulators, Billet, Low Pressure, 4.5 to 9 psi, Return Style, 3/8 in. NPT, Inlet and Outlet, Black Finish, Bracket, Each

SKU: HLY12-841

Fuel Pressure Regulators
A$328.80
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

Part of Holley's complete line of fuel system products, Holley HP billet fuel pressure regulators are available in a variety of configurations for carbureted or fuel injected engines. Some versions are even adaptable to either carburetors or EFI. They allow you to upgrade a carbureted system to EFI without replacing the fuel pressure regulator.

All HP billet fuel pressure regulators feature a 2-port design, provide for precise fuel pressure adjustments, and are available in your choice of demand (no return line) or by-pass (with a return line) styles. Depending on the model, they are for use only with electric fuel pumps, or with either mechanical or electric pumps. Designed for street/strip applications, they are CNC-machined from 6061 T-6 billet aluminum for strength and have bright dip anodized black bodies with clear dip anodized tops for corrosion resistance and good looks. Whatever your fuel system needs, Holley has you covered.

Depending on model, features may include:

* Adjustable from 4 to 65 psi for use with EFI or carburetors
* 4.5 to 9 psi adjustment range for use with carburetors only
* EFI-only models are adjustable from 15 to 65 psi
* Two port sizes available, 3/8 in. NPT or -6 AN inlet/outlet and return (where applicable)
* Fitting for manifold reference
* 1/8 in. NPT gauge port
* Boost reference--1:1

Part Type

HP Billet Fuel Press. Regulator w/Bypass

Data: v4.2 - Upd: 2026-10-15 03:10:07

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
12-841
Product Attributes - Part Type
Fuel Pressure Regulators
Product Attributes - Product Line
Holley HP Billet Fuel Pressure Regulators
Product Attributes - UPC
090127670460
Product Attributes - Regulator Pressure (psi)
4.5-9
Product Attributes - Regulator Style
Return
Product Attributes - Regulator Location
Inline
Product Attributes - Boost/Vacuum Reference Port
No
Product Attributes - Gauge Port
Yes
Product Attributes - Inlet Quantity
1
Product Attributes - Regulator Inlet Size
3/8 in. NPT
Product Attributes - Inlet Attachment
Female threads
Product Attributes - Outlet Quantity
1
Product Attributes - Regulator Outlet Size
3/8 in. NPT
Product Attributes - Outlet Attachment
Female threads
Product Attributes - Return Fitting Size
3/8 in. NPT
Product Attributes - Return Attachment
Female threads
Product Attributes - Fittings Included
No
Product Attributes - Regulator Material
Aluminum
Product Attributes - Regulator Color
Black
Product Attributes - Rebuildable
No
Product Attributes - Mounting Bracket Included
Yes
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Holley
StreetFX SKU hly12-841
SFX Item ID 4782355
Supplier Item Code 4782355
Manufacturer SKU 12-841
Manufacturer UPC 90127670460
Alternative References HOL12-841

Compatibility

Application Data
  • Fuel TypeFLEX
    Regulator UsageCarburetor
    UniversalYes
  • Fuel TypeGAS
    Regulator UsageCarburetor
    UniversalYes

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