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  3. HOLLEY 6-504-2

HOLLEY 6-504-2 Needle Seat Carburetors .110 2300-4500

fits model: 110.

6-504-2 Holley .110 Needle And Seat Fits Most 2300-4500 Series Carburetors Pair

( Brand: Holley ), ( Type: Needle And Seat ), ( Manufacturer Part Number: 6-504-2 ), ( Material: Brass ), ( Universal Fitment: Yes )

Review HOLLEY .110 Needle And Seat Most 2300-4500 Series Carburetors Pair fits 110

The Holley 6-504-2 110 needle seat 2300-4500 carburetor is a high-performance fuel delivery system designed for automotive applications. This carburetor is part of Holley's Ultra series, which is known for its advanced features and exceptional power delivery.

The 110 CFM (cubic feet per minute) carburetor is ideal for engines that require a moderate fuel flow rate, making it a popular choice for street rods, muscle cars, and performance trucks. The 2300-4500 vacuum secondary design ensures excellent idle quality and smooth power delivery at all RPMs, while the 110 needle and seat setup provides precise fuel metering for optimal engine efficiency.

The Holley 6-504-2 carburetor features a removable bowl, which makes it easy to access for tuning and maintenance. The bowl is made of aluminum, keeping the weight down and helping to dissipate heat. The carburetor also includes a baffled float bowl design, which reduces fuel slosh and promotes consistent fuel delivery.

The primary circuit is controlled by a 3-inch primary venturi, while the secondary circuit is controlled by a 2-inch secondary venturi. The secondary circuit is vacuum-actuated, meaning that it opens when vacuum is applied to the carburetor. This design helps to ensure that the engine receives the correct fuel mixture under all conditions.

The carburetor comes with a number of factory-installed options, including a 650 CFM accelerator pump, a 1-quart fuel pressure regulator, and a Holley 0-80 power valve. These options help to ensure that the carburetor can provide the necessary fuel flow for high-performance applications.

The Holley 6-504-2 110 needle seat 2300-4500 carburetor is a high-quality, high-performance fuel delivery system that is ideal for automotive applications requiring moderate fuel flow rates. Its advanced features, including a vacuum secondary design and a removable bowl, make it easy to tune and maintain, while its durable construction ensures long-lasting performance. Whether you're building a street rod, restoring a muscle car, or upgrading the fuel system on your performance truck, the Holley 6-504-2 carburetor is an excellent choice.

The Holley 6-504-2 110 needle seat 2300-4500 carburetor is a popular choice among automotive enthusiasts for its versatility and performance in a wide range of applications. Here are some pros and cons to consider before making a purchase:

Pros:

1. Wide Application Range: This carburetor can be used in a variety of applications, including street rods, hot rods, muscle cars, and even race cars. Its vacuum secondary design provides excellent idle quality and drivability.

2. Easy to Install: The Holley 6-504-2 carburetor comes with a detailed instruction manual, making it relatively easy to install for most DIYers. It also features a removable float bowl, making the rebuild process simpler.

3. Adjustability: The carburetor offers a high degree of adjustability, allowing users to fine-tune the mixture for optimal performance. It features 110 main jets and 23 secondary needles, providing a wide range of fuel delivery options.

4. Durability: Holley carburetors are known for their durability and reliability. The 6-504-2 model is no exception, featuring a heavy-duty cast aluminum body and brass components that can withstand the rigors of high-performance applications.

Cons:

1. Complexity: The Holley 6-504-2 carburetor is a complex piece of machinery, with many adjustments and components. This can make it more challenging to set up and tune compared to simpler carburetors.

2. Cost: Compared to some other carburetors on the market, the Holley 6-504-2 can be more expensive. However, many users believe that the additional cost is worth it for the performance and versatility that this carburetor offers.

3. Fuel Efficiency: While the Holley 6-504-2 carburetor can provide excellent performance, it may not be the most fuel-efficient option. Users may see a decrease in fuel economy compared to more modern fuel injection systems.

Conclusion:

The Holley 6-504-2 110 needle seat 2300-4500 carburetor is an excellent choice for automotive enthusiasts looking for a high-performance, versatile carburetor for their project car. Its wide application range, durability, and adjustability make it a favorite among many. However, its complexity and potential cost may be drawbacks for some. Ultimately, the decision to purchase this carburetor depends on the specific needs and budget of the user.

Recommendation:

If you are looking for a high-performance, versatile carburetor for your project car, the Holley 6-504-2 110 needle seat 2300-4500 carburetor is an excellent choice. Its wide range of applications, durability, and adjustability make it a favorite among many automotive enthusiasts. However, be prepared for the potential complexity and cost associated with this carburetor. If you are unsure about the installation and tuning process, it may be worth considering hiring a professional to help you get started.

part # 65042 prices

  • $14.95-$17.99

specifications carbcaddie:

  • for models: 110
  • brand: Holley
  • type: Needle And Seat
  • manufacturer part number: 6-504-2
  • material: Brass
  • universal fitment: Yes

general carbcaddie:

  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts
  • condition: New

seller carbcaddie:

  • # reviews: 459
  • rating: 99.6%

returns carbcaddie:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer

payments carbcaddie:

  • wallet: Paypal
  • other
  • credit card: Diners-club

shipping carbcaddie:

  • service: USPS Ground Advantage
  • class: Standard
  • transit: 4-8 Days
  • carrier: USPS
  • cost: $0.00
  • type: Calculated

offer carbcaddie:

  • started: April 17, 2025
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • quantity: 10
for models: 110, type: needle and seat, universal fitment: yes,
category: auto parts > car truck parts accessories > air fuel delivery > carburetor parts, material: brass, sku: 3608565385182883,

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