HOLLEY R3557 Carburetor Comet/ford C6OF-9510-N LIST-3557 5A5

( Brand: Holley ), ( Manufacturer Part Number: R3557 ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Oe/oem Part Number: C6of-9510-n ), ( Features: Down Draft ), ( Country/region Of Manufacture: United States )

Review HOLLEY Mercury Comet/ford Carburetor Date 5a5 fits COMET FAIRLANE

The Holley R3557 carburetor, specifically the C6OF-9510-N model, is a high-performance carburetor designed for use in 1964-1966 Mercury Comets and Ford Fairlane models with a 289 cubic inch V8 engine. This carburetor is part of Holley's Double-Pumper series, which is known for its ability to deliver excellent idle quality and powerful throttle response.

The C6OF-9510-N features a unique design that includes a 500 CFM double-pumper base, providing increased airflow and fuel delivery for improved engine performance. The carburetor is equipped with Holley's advanced Emulsion Tube Technology, which ensures precise fuel metering and a smooth, consistent idle. The base is also topped with a 750 CFM dual-feed secondary venturi, designed to deliver the necessary fuel for high RPM power.

The C6OF-9510-N comes with a variety of factory-set jetting options to accommodate different engine configurations and operating conditions. The primary jets range from 0.060" to 0.095", while the secondary jets range from 0.030" to 0.068". The carburetor also includes a power valve, which can be adjusted to optimize performance based on engine size and tuning preferences.

The base is constructed from high-quality aluminum and features a polished finish, adding a touch of style to any engine bay. The C6OF-9510-N also includes a Holley vacuum secondary system, which utilizes a mechanical secondaries design for reliable and consistent vacuum operation. The carburetor is also compatible with Holley's electronic fuel injection systems, allowing for easy conversion to electronic fuel injection for those looking for even more performance and tuning capabilities.

In summary, the Holley R3557 C6OF-9510-N carburetor is a high-performance, versatile carburetor designed for use in 1964-1966 Mercury Comets and Ford Fairlane models with a 289 cubic inch V8 engine. With its advanced design features, including Double-Pumper technology, Emulsion Tube Technology, and a variety of factory-set jetting options, this carburetor delivers excellent idle quality, powerful throttle response, and reliable fuel delivery for improved engine performance.

The Holley 3557 carburetor, specifically the C6-9510-N model for the Mercury Comet and Ford Fairlane, is a popular choice among classic car enthusiasts due to its high-performance capabilities. Here are some pros and cons to help you make an informed decision about whether or not to buy this carburetor:

1. High-performance: The Holley 3557 carburetor is known for its excellent performance capabilities, making it a popular choice for high-performance applications. It offers excellent fuel mixture control, allowing for improved engine response and power.

2. Adjustability: This carburetor offers a high degree of adjustability, allowing you to fine-tune the air/fuel mixture to your specific engine and driving conditions. It comes with various adjustment options, such as primary and secondary mixture screws, idle mixture screws, and a vacuum secondary control.

3. Durable construction: The Holley 3557 carburetor is built to last, with a robust design and high-quality materials. It features a heavy-duty cast aluminum base and a billet aluminum top, making it resistant to corrosion and wear.

4. Easy installation: The carburetor comes with detailed instructions and is relatively easy to install, making it a popular choice for the DIY enthusiast.

5. Wide compatibility: The Holley 3557 carburetor is compatible with a wide range of applications, making it a versatile choice for classic car owners.

1. Complexity: The high degree of adjustability and complex design of the Holley 3557 carburetor can be overwhelming for some users, especially those who are not experienced in carburetor tuning.

2. Cost: The Holley 3557 carburetor is more expensive than some other options on the market, making it a significant investment for some classic car owners.

3. Fuel economy: Due to its high-performance capabilities, the Holley 3557 carburetor may not offer the same level of fuel economy as some other options, which could be a concern for those looking to save on fuel costs.

In conclusion, the Holley 3557 carburetor, specifically the C6-9510-N model for the Mercury Comet and Ford Fairlane, is a high-performance carburetor that offers excellent adjustability, durability, and compatibility. However, it comes with a higher cost and a complex design that may be overwhelming for some users. If you are looking for a high-performance carburetor for your classic car and are willing to invest in the learning curve, then the Holley 3557 carburetor could be an excellent choice for you. However, if you are looking for a more affordable or simpler option, there may be other carburetors on the market that better suit your needs.

If you are considering purchasing the Holley 3557 carburetor, I would recommend doing your research and familiarizing yourself with the adjustment options and tuning procedures before making the purchase. Additionally, consider purchasing the carburetor from a reputable dealer or supplier to ensure that you receive a high-quality product. Lastly, make sure that the carburetor is compatible with your specific vehicle application before making the purchase.

Details:

The OE/OEM part number is C6OF-9510-N and the manufacturer R3557. This square bore mounting flange type carburetor has a down draft feature and four barrels. It was made in the USA. Is in need of a rebuild part missing is fuel transfer tube all other parts seem to be there.

Up for sale is a Holley carburetor designed 66 Mercury Comet and Ford Fairlane model's.

part #: r3557 prices

• $245.00-$400.00

specifications carbcoon:

• for models: Comet, Fairlane
• for makes: Mercury, Ford
• brand: Holley
• mpn: R3557
• type: Carburetor
• mounting flange type: Square Bore
• oe/oem part number: C6of-9510-n
• features: Down Draft
• country/region of manufacture: United States

payments carbcoon:

• other
• credit card: Diners-club
• wallet: Google-pay

general carbcoon:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

returns carbcoon:

• policy: No Returns

seller carbcoon:

• city: Castalian Springs, Tennessee
• rating: 100.0%
• # reviews: 642

offer carbcoon:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• started: March 5, 2025
• sold: 0

shipping carbcoon:

• type: Fixed
• carrier: USPS
• class: Expedited
• cost: $0.00
• transit: 3-9 Days
• service: USPS Priority Mail

Holley R3557 Is Similar To:

• Holley 4557 Ls6 L78 396 454 Carburetor 3967477-gg 1970 Chevelle Camaro Nova (41.3% similar) She was removed off of a running BBC motor but has been sitting for few months. It has not been tested and could possibly need work, labor, other parts/materials before use. May be shipped via ups, USPS or FedEx. The base plate was replaced. Selling an oem Holley list 4557 carburetor with...(May 17th, 2024)
• Holley 10741 Teapot 4000 4-barrel Carburetor 1074-1 Core 1955 Ford Thunderbird 292 V-8 (38.6% similar) Ford part number EYCK-9510-T. Holley teapot 4000 4-BARREL carburetor, list number 1074-1. Please verify part number and pictures match your application. Linkage moves free. See pics for condition. Carb core appears to be mostly complete. Core for rebuilding or parts...(May 17th, 2024)
• Holley 1920 Vintage Glass Bowl Carburetor Hot Rod Gasser Carb Core Rebuild (36.5% similar) Good condition all linkage moves as it should great for rebuild...(May 17th, 2024)
• Holley 06425c Two Barrel 650cfm Carburetor 6425 Imca Cheater Outlaw Racing Core (40.2% similar) Rare Holley two barrel carburetor, list number 6425 - carb is together with choke removed but horn intact metering block also in very nice physical condition, all linkage moves freely kick down arm as well good overall core condition has been sitting fryers it should base and bores look...(May 17th, 2024)
• Holley Ecz-9510-m Teapot 4000 4-barrel Carburetor 1161-2 Carb 1956 Ford Thunderbird 312 V-8 (35.2% similar) Carb core appears to be mostly complete. Core for rebuilding or parts. Holley teapot 4000 4-BARREL carburetor, list number 1161-2. Please verify part number and pictures match your application. See pics for condition. Ford part number CZ-9510-M. Linkage moves free...(May 18th, 2024)
• Holley R3310-1 Carburetor List-3310-1 780cfm H4-4150 4bbl Carb Ford Chevy Bop Mopar (36.9% similar) Used Holley 780 cfm 4BBL carburetor. Being sold for parts, restoration, core, rebuild. Looks to be complete, no cracks, being sold as/is. LIST-3310-1, date, 0653...(May 18th, 2024)
• Holley List-4056 1968 Rare Automatic Corvette Tri Power Carbs 821 Feb Show Restored (22.6% similar) Part #: Holley LIST-4056 for sale...(May 19th, 2024)
• Holley 1850-3 Carburetor 4 Barrel 600 Cfm Vac Secondary Nice Rebuildable Core (30.9% similar) Many of the carbs have been rebuilt and were sitting in plastic bags, but I no history on what was done to them. It is missing a part of the electric choke. Very nice and clean vintage. Spectre fuel system accessory carburetor. The rest of it looks complete. 600 cfm vac...(May 19th, 2024)
• Holley 4360 Economaster 450 Cfm Carburetor 7454 Quadrajet Replacement Chevrolet (36.6% similar) List number is 7454. For sale is one 1 used Holley 4360 series 450 cfm spread bore carburetor. Verify it will fit your application prior to purchasing. Please look closely at all the pictures for condition and details. The carb is in poor shape and for parts only...(May 19th, 2024)
• Holley List-7001 4165 Spreadbore Carburetor 650cfm Core Or Parts (39.7% similar) This model is a spread bore design double pumper with two accelerator pumps. You are buying on a Holley model 4165 four-barrel carburetor, stamped p/n # LIST-7001, date code 1610, rated at 650 cfm ...(May 19th, 2024)
• Holley 4779 4150 4779 750cfm Competition Drag Racing Double Pumper Carburetor (37% similar) Holley 4150/4779/750C FM, competition drag racing double pumper carburetor. Is totally rebuilt, is in like new condition, and ready to install. This is an actual photo of the carb...(May 19th, 2024)