HOLLEY 300-945 Top Intake Plenum Big Block 090127963425 4150

( Brand: Holley ), ( Part Type: Intake Block ), ( Material: Aluminum ), ( Manufacturer Part Number: 300-945 ), ( Manufacturer Warranty: Manufacturers Limited 90 Day Warranty ), ( Item Height: 3.000 ), ( Item Length: 20.500 ), ( Item Width: 11.500 ), ( UPC: 090127963425 )

Review HOLLEY Hi ram Intake Plenum Top 4150 Big Block Chevy Small fits RAM

The Holley 300-945 Hi-Ram Intake Plenum is a high-performance intake solution designed specifically for big block Chevy engines running Holley 4150 series carburetors. This intake plenum top is an essential component of the intake system, responsible for distributing the air and fuel mixture evenly to each cylinder for optimal engine performance.

This Holley Hi-Ram Intake Plenum top is meticulously crafted from heavy-duty aluminum, ensuring both strength and lightweight construction. Its unique Hi-Ram design features large ram tubes that provide excellent airflow and an increased velocity of the air-fuel mixture entering the carburetor bowls. This design helps to improve the engine's power output and responsiveness.

The Holley 300-945 Hi-Ram Intake Plenum top is equipped with a large, smooth-flowing plenum chamber. This design allows for increased volume and better distribution of air, ensuring even fuel delivery to each cylinder. The plenum also features large, ported openings for the carburetor mounting bosses, making installation quick and easy.

The intake plenum top comes with pre-drilled and tapped bosses for easy mounting of the Holley 4150 series carburetors. It also includes provisions for mounting the throttle linkage rods. This intake plenum top is designed to work seamlessly with other Holley Hi-Ram intake manifolds and components, making it a versatile choice for big block Chevy engine builds.

The Holley 300-945 Hi-Ram Intake Plenum top is finished with a high-quality, durable powder coat finish. This finish not only looks great but also provides excellent protection against the elements, ensuring the longevity of the intake plenum top.

In summary, the Holley 300-945 Hi-Ram Intake Plenum top is a high-performance, versatile, and durable solution for big block Chevy engines running Holley 4150 series carburetors. Its unique Hi-Ram design, heavy-duty construction, and easy installation make it an essential component for any serious engine build.

The Holley 300-945 Hi-Ram intake plenum for a big block Chevy using a 4150 carburetor is a popular choice among performance enthusiasts. This intake manifold offers several advantages, but it also comes with some potential drawbacks. Let's examine the pros and cons to help you make an informed decision.

1. Improved Airflow: The Holley Hi-Ram intake manifold is known for its high-performance design that provides increased airflow to the engine. This results in improved engine performance and power output.

2. Versatility: This intake manifold is compatible with various carburetor sizes and styles, making it a versatile choice for Chevy big block engines.

3. Easier Installation: Compared to other high-performance intake manifolds, the Holley Hi-Ram manifold is relatively easier to install. It comes with detailed instructions and is designed to fit most Chevy big block engines with minimal modifications.

4. Durability: Holley is known for its high-quality parts, and the Hi-Ram intake manifold is no exception. It is made from durable aluminum and is designed to withstand the rigors of high-performance driving.

5. Enhanced Appearance: The Holley Hi-Ram intake manifold boasts a unique, high-performance appearance that is sure to impress fellow enthusiasts.

1. Cost: The Holley Hi-Ram intake manifold is more expensive than a stock intake manifold. This may be a deterrent for some budget-conscious enthusiasts.

2. Complexity: While the installation process is relatively straightforward, the Holley Hi-Ram intake manifold is more complex than a stock intake manifold. This could make it less suitable for those with limited mechanical skills.

3. Requires Carburetor Tuning: Due to the increased airflow, the Holley Hi-Ram intake manifold may require additional carburetor tuning to achieve optimal performance.

4. Potential Clearance Issues: Depending on the specific engine configuration, there may be clearance issues with the Holley Hi-Ram intake manifold. This could require additional modifications or the use of aftermarket components.

The Holley 300-945 Hi-Ram intake manifold offers several advantages for big block Chevy engines, including improved airflow, versatility, easier installation, durability, and enhanced appearance. However, it also comes with some potential drawbacks, such as cost, complexity, the need for carburetor tuning, and potential clearance issues.

If you are looking for maximum performance from your big block Chevy engine and are willing to invest the time and resources into the installation and tuning process, then the Holley Hi-Ram intake manifold could be an excellent choice. However, if you are on a tight budget or have limited mechanical skills, then a stock intake manifold may be a more suitable option. Ultimately, the decision comes down to your specific goals, budget, and level of mechanical expertise.

Details:

The Big Block Chevy Hi-Ram manifold is available in either a traditional 105mm plenum top or with 2 x 4150 4-barrel throttle body options. Buyer pays return shipping. Requires the use of early type GM or small cap MSD Holley Distributors. 300-945 Holley Hi-Ram Intake Plenum Top, 2 x 4150 - Big Block Chevy / Small Chevy: Fits Manifolds for.

The iconic Chevy SBC BBC platforms are primed for 21st century induction systems, Holley EFI engine management, and fuel systems. Traditional Big Block Chevy engines can now also be fitted with the Holley Brand Hi-Ram type EFI intake manifolds that have so well served GM LS LT, Gen 3 Hem, SBF Ford, and Ford Coyote engine platforms. Hi-Ram intake manifolds are a cost-effective alternative to fabricated sheet-metal or billet for high-performance applications where induction system height is not limited. Not compatible with HEI distributors.

part #: 300945 price

• $233.95

specifications inputmanifolds:

• for models: Ram
• for makes: Chevy
• brand: Holley
• part type: Intake Block
• material: Aluminum
• manufacturer part number: 300-945
• manufacturer warranty: Manufacturers Limited 90 Day Warranty
• item height: 3.000
• item length: 20.500
• item width: 11.500
• upc: 090127963425

general inputmanifolds:

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

shipping inputmanifolds:

• transit: 4-10 Days
• class: Standard
• cost: $0.00
• type: Fixed
• service: UPS Ground
• carrier: UPS

payments inputmanifolds:

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

offer inputmanifolds:

• started: June 20, 2025
• availability: In Stock
• options: Ship-to-home
• sold: 0

seller inputmanifolds:

• # reviews: 74949
• rating: 99.1%
• city: USA

returns inputmanifolds:

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

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