HOLLEY 12R-4708B Double Pumper Base Plate Bores 12R-4507B 1.750

( Brand: Holley ), ( Type: Throttle Base Plate ), ( Manufacturer Part Number: 12R-4708B ), ( Performance Part: Yes )

Review HOLLEY Double Pumper Base Plate 1.750 Bores fits 750

The Holley 12r-4708b Double Pumper Base Plate is a high-performance fuel system component designed for serious race applications. This base plate is compatible with the Holley 12r-4507b carburetor and features 1.750-inch bores.

This double pumper design allows for the use of two fuel pumps, providing increased fuel flow and pressure for high-horsepower engines. The base plate is constructed from heavy-duty aluminum, ensuring durability and strength under the most demanding racing conditions.

The 12r-4708b base plate is designed to accept two Holley 11-38 or 11-50 fuel pumps, which can be plumbed in parallel for even greater fuel flow. The fuel inlets and outlets are machined with precision, allowing for easy fuel line installation and secure connections.

The surface of the base plate is finished with a high-quality anodized coating, which not only looks great but also provides an additional layer of protection against corrosion. The base plate also includes mounting holes for easy installation on various engine applications.

The Holley 12r-4708b Double Pumper Base Plate is a must-have for any race car builder or performance enthusiast seeking to maximize fuel flow and pressure for their high-horsepower engine. With its rugged construction, versatile design, and high-performance capabilities, this base plate is sure to deliver reliable fuel delivery and help take your engine to the next level.

The Holley 12r-4708B double pumper and the 12r-4507B 1.750 bore carburetors are popular choices for automotive enthusiasts seeking high-performance fuel delivery systems. Here are some pros and cons of investing in these carburetors:

1. High Flow Rate: The Holley 12r-4708B double pumper carburetor is capable of delivering a large amount of fuel, making it suitable for high-performance applications with big engines.

2. Fuel Efficiency: Despite its high flow rate, this carburetor is known for its fuel efficiency. It can provide precise fuel delivery for optimal engine performance, which can lead to better gas mileage.

3. Easy Installation: The 12r-4708B double pumper comes with a base plate that simplifies the installation process. The base plate includes provisions for mounting accessories, such as fuel pressure regulators and air cleaners.

1. Complexity: The double pumper design of this carburetor can be more complex than single-pumper carburetors. This might make it more difficult to tune and maintain.

2. Cost: The Holley 12r-4708B double pumper carburetor is typically more expensive than single-pumper models due to its high flow rate and advanced features.

1. Versatility: The Holley 12r-4507B 1.750 bore carburetor is a versatile option that can be used in a wide range of applications, including street rods, muscle cars, and performance trucks.

2. Easy Tuning: This carburetor features a relatively simple design, making it easier to tune than some other high-performance carburetors.

3. Affordability: Compared to the Holley 12r-4708B double pumper, the 12r-4507B 1.750 bore carburetor is typically more affordable.

1. Limited Flow Rate: The 12r-4507B 1.750 bore carburetor has a lower flow rate than the 12r-4708B double pumper, which might limit its suitability for high-performance applications with large engines.

2. Less Fuel Efficient: Due to its smaller bores, this carburetor may not be as fuel efficient as the Holley 12r-4708B double pumper.

Both the Holley 12r-4708B double pumper and the 12r-4507B 1.750 bore carburetors have their strengths and weaknesses. If you're looking for a high-performance carburetor with a large flow rate, the 12r-4708B double pumper might be the better choice, despite its complexity and higher cost. On the other hand, if you're working on a budget or require a carburetor that's easier to tune, the 12r-4507B 1.750 bore carburetor could be the more suitable option.

Consider the specific requirements of your project, such as engine size, budget, and tuning preferences, before deciding between the Holley 12r-4708B double pumper and the 12r-4507B 1.750 bore carburetors. If you're working on a high-performance application with a large engine, the Holley 12r-4708B double pumper might be the better investment. Otherwise, the Holley 12r-4507B 1.750 bore carburetor could provide the versatility and affordability you're looking for.

part # 12r4708b prices

• $225.00-$850.00

specifications carbcaddie:

• for models: 750
• brand: Holley
• type: Throttle Base Plate
• manufacturer part number: 12R-4708B
• performance part: Yes

general carbcaddie:

• condition: For parts or not working
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts

seller carbcaddie:

• rating: 100.0%
• # reviews: 2517

returns carbcaddie:

• policy: No Returns

offer carbcaddie:

• quantity: 1
• sold: 0
• availability: In Stock
• started: June 26, 2025
• best offers: True
• options: Ship-to-home

shipping carbcaddie:

• service: Economy
• type: Fixed
• cost: $15.00
• transit: 11-16 Days
• class: Economy

payments carbcaddie:

• credit card: Mastercard
• wallet: Paypal
• other

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