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Description
Holley Billet Fuel Adjustable Regulator Carbureted 4.5-9PSI # HO12-845Holley Billet Fuel Adjustable Regulator Carbureted 4. 5 9PSI # HO12 845 Fuel Pressure Regulators, HP Billet, 4. 5 to 9 psi, Inline, Return Style, 8 AN Inlet and Outlet, 6 AN Return, Black Finish, Bracket, Each Regulator Pressure (psi): 4. 5 9 Regulator Style: Return Regulator Location: Inline Boost Vacuum Reference Port: No Gauge Port: Yes Inlet Quantity: 1 Regulator Inlet Size: 8 AN Inlet Attachment: Female straight cut O ring Outlet Quantity: 1
Holley Billet Fuel Adjustable Regulator Carbureted 4.5-9PSI # HO12-845Fuel Pressure Regulators, HP Billet, 4.5 to 9 psi, Inline, Return Style, -8 AN Inlet and Outlet, -6 AN Return, Black Finish, Bracket, Each
Regulator Pressure (psi):
4.5-9
Regulator Style:
Return
Regulator Location:
Inline
Boost/Vacuum Reference Port:
No
Gauge Port:
Yes
Inlet Quantity:
1
Regulator Inlet Size:
-8 AN
Inlet Attachment:
Female straight cut O-ring
Outlet Quantity:
1
Regulator Outlet Size:
-8 AN
Outlet Attachment:
Female straight cut O-ring
Return Fitting Size:
-6 AN
Return Attachment:
Female straight cut O-ring
Fittings Included:
No
Regulator Material:
Aluminum
Regulator Color:
Black
Rebuildable:
No
Mounting Bracket Included:
Yes
Remanufactured:
No
Quantity:
Sold individually.
Notes:
This regulator is designed for use with Holley HP in-line or other high pressure fuel pumps where a return line is required.
Holley HP Billet Fuel Pressure Regulators
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
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Beautiful and work great
They come not filled which is what I wanted. I filled one with Baja mineral sea salt one with pink sea salt and the other with peppercorns. They are beautiful and work great 👍
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Great deal, 100% Satisfied.
Great size, comes the lid, well packed, fast delivery and really nice price.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Grinder Set of 3
I really like these I use one for rainbow peppercorns and one for black peppercorns. The third one I am using for some coarse pink salt I accidently purchased instead of fine, once the coarse salt is used up, I plan to use it for white peppercorns. They work great, look good and are the perfect size for everyday use.
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Reviewed in the United States on March 1, 2026
★★★★★ 5
Great product
Love that theyre adjustable.
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Reviewed in the United States on April 19, 2026
★★★★★ 3
Poor Quality
I wouldn't gift these... they seem to start having grinding issues after a few days of use. It feels like the grinding piece is binding / going to break when turning the top. Would not purchase again, and look for more durable item.
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Reviewed in the United States on March 20, 2023