Holley 12-840 HP Billet Carbureted Fuel Pressure Regulator, Adjustable

#42512840

Holley 12-840 HP Billet Carbureted Fuel Pressure Regulator, Adjustable

Name: Holley 12-840 HP Billet Carbureted Fuel Pressure Regulator, Adjustable
Brand: Holley
SKU: 42512840
Price: 158.95 USD
Availability: InStock
Rating: 4.3 (3 reviews)

3 Reviews

1 Question

It is adjustable from 4.5-9 psi for precise fuel pressure adjustments
Made of billet aluminum with a black anodized base and clear anodize top for good looks
To be used in systems where a return line is not needed

$158.95

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Product Summary

Universal Fit, 4.5-9 Fuel Pressure Rating (psi)

It is adjustable from 4.5-9 psi for precise fuel pressure adjustments
Made of billet aluminum with a black anodized base and clear anodize top for good looks
To be used in systems where a return line is not needed
Has one 3/8" NPT inlet and two 3/8" NPT outlets
Is comparable and interchangeable with popular Holley® 12-803 regulator

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Key Specs

MFG. Part #	12-840
Brand	Holley
Material Type	Aluminum

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Holley 12-840 Details

Holley® Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley®. 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 and good looks. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports.

Adjustable from 4.5-9 psi for precise fuel pressure adjustments
Constructed of billet aluminum with a black anodized base and clear anodize top for good looks
Used in systems where a return line is not needed
Use with electric or mechanical pumps
One 3/8" NPT inlet and two 3/8" NPT outlets
1/8" NPT gauge port
Comparable and interchangeable with popular Holley® 12-803 regulator
Mounting bracket included

Charts

Installation Instructions (PDF)

Guides & Documents

Fuel Pressure Regulators Installation Instructions (42512840)

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

Holley 12-840 Specifications

KEY SPECS
MFG. Part #	12-840
Brand	Holley
Material Type	Aluminum

GENERAL
Fuel Pressure Rating (psi)	4.5-9
Pressure Regulator Inlet Size	3/8" NPT
Pressure Regulator Outlet Size	3/8" NPT
Fuel Type	Gasoline
GTIN Code	090127670453

Ratings & Reviews

4.3

3 Reviews

Overall Assessment

Customers give positive feedback about the product's quality and feature-set. The fuel pump works perfectly, demonstrating high-quality performance and immediate practical value. Its unique mounting feature stands out. While one customer replaced the pump after 3 years due to its mounting advantage, it's worth noting they would have considered other products if not for this particular aspect, showcasing the product's unique appeal versus competitors. Customers widely recommend it for its efficacy and unmatched features.

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4.3

3 reviews

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Looks great and well made

5.0

a year ago

31Rat

Princeton NC

Verified

Part seems well made. Heavy and looks great on the '31.

Would Recommend

Works perfect

5.0

6 years ago

Armando M

El Paso, TX

Verified

New fuel pump was flooding my carb. This worked perfectly!

Would Recommend

Replaced the old one after only 3 years

3.0

8 years ago

69 Mustang

Verified

I bought the same one because of unique mounting location of the first one, or else I would have bought a different model or brand.

Would Not Recommend

Showing 3 of 3 reviews

Questions & Answers

1 Question • 1 Answer

Sort Questions

Is this compatible with E85 fuel?

by Dano

• 8 years ago

1 answer

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1 of 1 questions shown