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- Holley 12-804 Chrome Carbureted Fuel Pressure...
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Item #:
2408
Holley 12-804 Chrome Carbureted Fuel Pressure Regulator
87% of respondents would recommend this to a friend
Item #:
2408
SCR 1033
Price Details
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*All items will import from US
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Imported from USA store
QTY:
Order now and get it around Wednesday, September 23
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Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor.
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What Stands Out
Precision Adjustment
The Holley 12-804 offers precise fuel pressure adjustments for optimal engine performance, ensuring that your vehicle runs smoothly under various conditions.
Durable Construction
Crafted with high-quality materials, this fuel pressure regulator promises longevity and durability, providing reliable performance even in demanding environments.
Integrated Gauge Port
With an integrated gauge port, the Holley 12-804 allows for easy monitoring of fuel pressure, giving users complete control over their fuel system's efficiency.
Product Details
- Adjustable fuel regulation from 1 to 4 psi
- Features 220 (7/32) restriction
- Equipped with 3/8 NPT ports (1 in, 2 out) and includes mounting bracket
- Pre-set at 2.8 PSI, eliminating guesswork during installation
- Designed to precisely control fuel pressure to prevent flooding or drivability issues
- Holley's century-long expertise in fuel-system design and commitment to customer satisfaction
| Country of Origin | This item will be imported from US |
| Item Weight | 1.5 lbs (680 grams) |
| What is in the box | Holley 12-804 Chrome Carbureted... For more details, please check description/product details |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
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Performance Enthusiasts
Ideal for car enthusiasts looking to optimize fuel delivery and enhance engine performance in modified vehicles.
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Racing Applications
Suitable for racers needing precise fuel pressure control under high-stress conditions for consistent engine performance.
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Custom Builds
Perfect for individuals building custom engine setups requiring adjustable fuel pressure for varied performance needs.
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Stock Vehicles
Not ideal for regular vehicles with factory settings that do not require upgraded fuel pressure management.
Product Description
Holley 12-804 Chrome Carbureted Fuel Pressure Regulator
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Customer Questions & Answers
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Question:
What is the primary function of the Holley HOL 12-804 Fuel Pressure Regulator?
Answer: The Holley HOL 12-804 Fuel Pressure Regulator is designed to maintain consistent fuel pressure within your engine's fuel system. This regulation ensures optimal fuel delivery, which is crucial for performance and efficiency. By effectively managing fuel pressure, it allows for proper combustion and can contribute to enhancing engine power output, while also helping to prevent issues related to fuel delivery and performance inconsistencies. -
Question:
Can the Holley HOL 12-804 be used in both carbureted and fuel-injected systems?
Answer: Yes, the Holley HOL 12-804 Fuel Pressure Regulator is versatile and can be utilized effectively in both carbureted and fuel-injected systems. This dual compatibility makes it a flexible choice for enthusiasts looking to fine-tune their fuel systems. By adjusting the pressure setting, users can easily switch between configurations, making it an excellent investment for various engine setups. -
Question:
What is the maximum fuel pressure rating for the Holley HOL 12-804?
Answer: The Holley HOL 12-804 Fuel Pressure Regulator has a maximum fuel pressure rating of 7 psi. This specification is essential for ensuring that your fuel delivery remains optimal, especially for high-performance applications. With the ability to set and adjust pressure based on your system's needs, it helps maintain peak fuel efficiency, which is key in any performance-oriented vehicle. -
Question:
How does the Holley HOL 12-804 improve engine performance?
Answer: By regulating fuel pressure, the Holley HOL 12-804 directly contributes to improved engine performance. Consistent fuel pressure ensures that the engine receives the right amount of fuel, leading to better combustion efficiency. This can result in increased horsepower and torque, making it particularly beneficial for performance builds. Additionally, it helps avoid lean conditions that can damage the engine over time. -
Question:
Is installation of the Holley HOL 12-804 Fuel Pressure Regulator complicated?
Answer: Installation of the Holley HOL 12-804 Fuel Pressure Regulator is straightforward for those familiar with automotive systems. It typically involves connecting the regulator to the fuel line, setting the desired pressure, and ensuring all connections are secure. Many users find that having basic tools and a bit of mechanical knowledge is sufficient for a successful installation, allowing them to enhance their vehicle's fuel system with confidence. -
Question:
What is the material construction of the Holley HOL 12-804?
Answer: The Holley HOL 12-804 Fuel Pressure Regulator is constructed from high-quality aluminum, which provides durability and resistance to corrosion. This robust material ensures longevity even under high-pressure conditions. The design is lightweight and efficient, making it suitable for both daily use and racing applications, where reliable performance is essential. -
Question:
Does the Holley HOL 12-804 come with adjustable settings?
Answer: Yes, the Holley HOL 12-804 Fuel Pressure Regulator features adjustable settings, allowing users to fine-tune the fuel pressure according to their specific engine requirements. This adjustability is vital for optimizing performance, particularly when modifications are made to the engine. Users can easily adapt the regulator to accommodate changes in fueling needs for various driving styles or performance enhancements. -
Question:
What are the benefits of using the Holley HOL 12-804 in racing applications?
Answer: Using the Holley HOL 12-804 Fuel Pressure Regulator in racing applications provides significant advantages, such as enhanced fuel delivery and optimized engine performance. The adjustable pressure setting allows racers to fine-tune fuel flow for maximum horsepower. Additionally, maintaining consistent fuel pressure during high-stress racing scenarios reduces the likelihood of lean conditions, ensuring reliability on the track. -
Question:
What tools are required to install the Holley HOL 12-804 Fuel Pressure Regulator?
Answer: To install the Holley HOL 12-804 Fuel Pressure Regulator, you typically need basic tools such as a wrench set, screwdrivers, and possibly a fuel line removal tool. Having these tools on hand allows you to efficiently attach the regulator to your fuel system. It's advisable to also have some fuel-safe hose and clamps available, should you need to make modifications to the existing fuel lines. -
Question:
Where can I buy the Holley HOL 12-804 Fuel Pressure Regulator?
Answer: You can buy the Holley HOL 12-804 Fuel Pressure Regulator conveniently from Ubuy. Ubuy offers a user-friendly platform to find and order automotive parts, ensuring you can access this essential component for your vehicle performance needs.
Holley Pressure Regulators Editorial Review
The Holley HOL 12-804 Fuel Pressure Regulator is highly recommended for those who need to adjust their fuel pressure. It is of good quality and easy to install. The regulator can be mounted flat or on its side. It also allows for the installation of a fuel pressure gauge. However, some users have reported issues with accuracy at low pressures.
Customer Reviews & Ratings
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Pros
- Allows for easy adjustment of fuel pressure
- Good quality
- Easy to install
- Can be mounted flat or on its side
- Allows for installation of a fuel pressure gauge
Cons
- Issues with accuracy at low pressures
Platform Trust & Buyer Confidence
JG
Jazz
Verified buyer
“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
EK
Emmanuel
Verified buyer
“I always receive support when I engage customer service. Overall my experience with UBUY has been top notch. Keep up the good work.”
31 August 2026 · via Trustpilot
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fnd
Verified buyer
“The delivery was fast and the product came undamaged and authentic.”
29 August 2026 · via Trustpilot
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“Ubuy is extremely efficient and to order online is an easy process. The verity of products to buy is really unlimited! My order was urgent and I got it on time. The products are great! Thank you Ubuy!”
25 August 2026 · via Trustpilot
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Hengo
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“Fast, convenient and cheap. Great store!”
27 August 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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SCR 1033
Order now and get it around Wednesday, September 23
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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Features & Benefits
- Controls fuel pressure to prevent flooding or drivability problems
- Fully adjustable to meet engine needs
- Pre-set at 2.8 PSI for easy installation
- Features 3/8 NPT in/out ports
- Includes mounting bracket
- Fuel regulation range from 1 to 4 psi
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