CARTER 6457S Thermoquad Carburetor Auto Trans Dodge/plymouth 400HP

( Brand: Carter ), ( Manufacturer Part Number: 6457S ), ( Choke Type: Automatic Choke ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Features: Thermoquad )

Review CARTER Thermoquad Carburetor Dodge/plymouth Part #6457s 400hp Auto Trans fits 1974

The Carter ThermoQuad 6457S carburetor is a high-performance fuel delivery system designed specifically for 1974 Dodge and Plymouth muscle cars equipped with 400 hp automatic transmissions. This quad-barrel carburetor is an upgraded version of the original Carter AFB design, offering improved fuel efficiency, smoother idle, and increased power output.

The Carter 6457S ThermoQuad is characterized by its distinctive four-barrel configuration, each barrel featuring a separate venturi and fuel bowl. The primary function of this design is to optimize the air-fuel mixture for each cylinder, ensuring a more complete combustion process and, consequently, enhanced power and torque.

The ThermoQuad 6457S also includes a number of innovative features designed to address the specific needs of high-performance applications. One such feature is the integrated electric choke, which provides quick and reliable starting in cold conditions. Additionally, the carburetor features a vacuum secondary system, which allows the secondary circuits to be enriched under light throttle conditions, ensuring adequate fuel delivery for optimal engine performance.

Another notable aspect of the Carter 6457S ThermoQuad is its thermostatic air temperature control system. This system maintains a consistent air temperature entering the carburetor, ensuring optimal fuel vaporization and, therefore, efficient combustion. The result is a more responsive and powerful engine that delivers exceptional performance, whether cruising at low RPMs or revving up for high-speed passes.

The Carter 6457S ThermoQuad carburetor is meticulously engineered and manufactured to the highest standards of quality and precision. Each component is carefully inspected and adjusted to ensure proper function and optimal performance. The carburetor housing is constructed from durable cast aluminum, while the fuel bowls and other critical components are made from corrosion-resistant materials.

Installation of the Carter 6457S ThermoQuad carburetor is a straightforward process, thanks to its compatibility with factory intake manifolds and wiring harnesses. The carburetor comes complete with all necessary hardware, including mounting brackets, gaskets, and bolts. Additionally, the ThermoQuad 6457S is calibrated to work with factory emissions systems and catalytic converters, making it an excellent choice for those seeking to maintain their muscle car's originality while maximizing performance.

In summary, the Carter ThermoQuad 6457S carburetor is a high-performance, quad-barrel fuel delivery system designed specifically for 1974 Dodge and Plymouth muscle cars with 400 hp automatic transmissions. With its innovative features, such as the vacuum secondary system, electric choke, and thermostatic air temperature control, the ThermoQuad 6457S delivers unrivaled power, torque, and efficiency. Its durable construction, ease of installation, and compatibility with factory emissions systems make it an excellent choice for those looking to enhance the performance of their classic muscle car.

The Carter ThermoQuad 6457 carburetor was a popular choice for high-performance applications in 1970s Dodge and Plymouth muscle cars, including those with 400hp automatic transmissions. Here are some pros and cons of buying this carburetor for your restoration or performance project:

1. Designed for high horsepower applications: The ThermoQuad 6457 was specifically designed to handle the power output of large engines, making it a good fit for a 400hp Dodge or Plymouth.

2. Improved idle and fuel economy: The ThermoQuad design includes separate idle and main circuits, which can help improve idle stability and fuel economy.

3. Wide availability: The Carter ThermoQuad 6457 is a commonly used carburetor in the muscle car community, making parts and information readily available.

4. Flexible tuning: The ThermoQuad design allows for more precise tuning of the fuel mixture, making it easier to achieve optimal performance.

1. Complexity: The ThermoQuad design is more complex than some other carburetor designs, which can make it more difficult to install and tune.

2. Cost: The ThermoQuad 6457 is a high-performance carburetor, and as such, it can be more expensive than stock or aftermarket alternatives.

3. Vacuum secondaries: The ThermoQuad design relies on vacuum to open the secondary circuits, which can make it more sensitive to vacuum leaks and other vacuum-related issues.

The Carter ThermoQuad 6457 is a high-performance carburetor that is well-suited to the power output of a 400hp Dodge or Plymouth automatic transmission. Its separate idle and main circuits can help improve idle stability and fuel economy, and its wide availability makes it a popular choice in the muscle car community. However, its complexity and cost can be drawbacks for some, and its sensitivity to vacuum issues may require more attention during installation and tuning.

If you are looking to build a high-performance Dodge or Plymouth muscle car with a 400hp automatic transmission, the Carter ThermoQuad 6457 is a solid choice for a carburetor. Its design is well-suited to the power output of the engine, and its wide availability makes it easy to find parts and information. However, be prepared for the added complexity and cost that come with a high-performance carburetor, and be sure to address any vacuum-related issues to ensure optimal performance.

Details:

Automatic Transmission. This is for a 1974 Dodge / Plymouth Chrysler.

part #: 6457s prices

• $78.00-$93.00

specifications carbcoon:

• for makes: Dodge, Plymouth
• for years: 1974
• brand: Carter
• mpn: 6457s
• choke type: Automatic Choke
• type: Carburetor
• mounting flange type: Square Bore
• features: Thermoquad

payments carbcoon:

• other
• wallet: Google-pay
• credit card: Mastercard

seller carbcoon:

• city: Saint Clair Shores, Michigan
• rating: 100.0%
• # reviews: 245

shipping carbcoon:

• cost: $35.00
• type: Fixed
• class: Standard
• transit: 4-8 Days
• carrier: UPS
• service: UPS Ground

returns carbcoon:

• policy: No Returns

general carbcoon:

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

offer carbcoon:

• sold: 0
• quantity: 1
• best offers: True
• started: May 29, 2025
• options: Ship-to-home
• availability: In Stock

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