HOLLEY 12R-4253B Nos Center Carb Base Plate 340/440

( Brand: Holley ), ( Part Type: Plate ), ( Manufacturer Part Number: 12R-4253B )

Review HOLLEY 340/440 Nos Carb Base Plate fits 340 440

The Holley 12r-4253B 340/440 NOS (New Old Stock) Center Carb Base Plate is a crucial component for any vintage or hot rod engine using a Holley 340 or 440 carburetor. This base plate is engineered with meticulous attention to detail, designed to provide a perfect fit and seamless integration with your engine setup.

Manufactured by Holley, a renowned name in the performance automotive industry, this base plate boasts exceptional build quality. It is crafted from high-grade aluminum, ensuring durability and longevity. The surface finish is smooth and polished, giving it an attractive appearance that complements the overall aesthetic of your engine bay.

This base plate is specifically designed for use with Holley 340 and 440 carburetors, ensuring a precise and secure fit. The NOS (New Old Stock) designation signifies that this base plate is an authentic reproduction of a vintage part, maintaining the original look and feel while providing modern functionality.

Installation is made easy with the inclusion of all necessary mounting hardware. The base plate comes with pre-drilled holes, allowing for quick and hassle-free installation. Additionally, it is compatible with various intake manifolds and engine configurations, making it a versatile choice for a wide range of applications.

The Holley 12r-4253B 340/440 NOS Center Carb Base Plate is more than just a functional component; it is a statement piece that adds authenticity and character to your engine build. Its high-quality construction, vintage appeal, and easy installation make it an essential addition to any performance automotive project.

The Holley 12-4253B 340/440 NOs Center Carb Base Plate is a popular choice among automotive enthusiasts and professional racers for its high performance and adjustability. However, like any other product, it comes with its own set of pros and cons.

1. High Performance: The Holley 4150 series carburetors are known for their excellent performance, especially in high-performance applications. This base plate is designed to accommodate the 340/440 NOs (no-overflow) carburetor model, which is ideal for high-RPM racing applications.

2. Adjustability: The Holley carburetors offer precise fuel mixture adjustability, allowing users to fine-tune their engine's fuel-air ratio for optimal performance and fuel efficiency.

3. Durability: The Holley carburetor base plate is made of high-quality aluminum material, which ensures durability and long-lasting performance.

4. Easy Installation: The base plate comes with pre-drilled mounting holes and a polished finish, making installation easy and straightforward.

1. Price: Holley carburetors are known for their high-performance capabilities, and as a result, they come with a premium price tag. This base plate is no exception, and it may be expensive for some enthusiasts.

2. Complexity: Holley carburetors offer a high degree of adjustability, which can be both a pro and a con. While the adjustability allows for fine-tuning, it can also be complex and time-consuming to set up correctly.

3. Fuel Economy: While the Holley carburetor offers excellent performance, it may not be the most fuel-efficient option. This can be a concern for those looking to maximize fuel economy.

The Holley 12-4253B 340/440 NOs Center Carb Base Plate is an excellent choice for high-performance applications where adjustability and durability are essential. However, it comes with a premium price tag and may not be the most fuel-efficient option. If you're looking for a high-performance carburetor for racing applications and are willing to pay the premium price, then this base plate is an excellent choice. If fuel economy is a priority, then you may want to consider other options.

If you're looking for a high-performance carburetor for racing applications and are willing to invest in the premium price tag, then the Holley 12-4253B 340/440 NOs Center Carb Base Plate is an excellent choice. It offers precision adjustability, durability, and high-performance capabilities that make it a favorite among automotive enthusiasts and professional racers. However, if fuel economy is a priority, then you may want to consider other options, such as a more fuel-efficient carburetor or an electronic fuel injection system.

part # 12r4253b price

• $5500.00

specifications carbcaddie:

• for models: 340, 440
• brand: Holley
• part type: Plate
• manufacturer part number: 12R-4253B

payments carbcaddie:

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

general carbcaddie:

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

returns carbcaddie:

• policy: No Returns

seller carbcaddie:

• rating: 100.0%
• # reviews: 598

shipping carbcaddie:

• cost: $35.00
• type: Fixed
• transit: 6-10 Days
• service: USPS Ground Advantage
• class: Standard
• carrier: USPS

offer carbcaddie:

• started: December 27, 2025
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• best offers: True
• sold: 0

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