HOLLEY 300-946 Top Intake Plenum Ls Big Block 090127963432 105MM

( Brand: Holley ), ( Part Type: Intake Block ), ( Material: Aluminum ), ( Manufacturer Part Number: 300-946 ), ( Manufacturer Warranty: Manufacturers Limited 90 Day Warranty ), ( Item Height: 7.500 ), ( Item Length: 23.500 ), ( Item Width: 12.500 ), ( UPC: 090127963432 )

Review HOLLEY Hi ram Intake Plenum Top 105mm Ls Big Block Chevy Small fits RAM

Introducing the Holley 300-946 Hi-Ram Intake Plenum Top, designed specifically for the LS Big Block Chevy engines. This intake plenum top is an essential component of your engine's intake system, responsible for distributing the air and fuel mixture evenly to each cylinder for optimal performance.

The Holley 300-946 Hi-Ram Intake Plenum Top is engineered with a unique Hi-Ram design, which utilizes a large, round, smooth bore runner with a high-velocity port that connects to the runner and a short, large velocity stack that connects to the intake manifold. This design provides a smooth, uninterrupted airflow path from the intake manifold to the runner, reducing turbulence and improving engine efficiency.

This intake plenum top features a 105mm (4.13 inches) runner length, which is ideal for high-performance applications that require increased airflow and power. The top surface of the plenum is flat and smooth, allowing easy installation and integration with various intake manifolds.

The Holley 300-946 Hi-Ram Intake Plenum Top is made from high-quality aluminum, ensuring durability and resistance to corrosion. It comes with a polished finish that not only looks great but also reduces friction and improves airflow. Additionally, the intake plenum top includes four (4) bolt-on mounting bosses, making installation a straightforward process.

In summary, the Holley 300-946 Hi-Ram Intake Plenum Top is an essential upgrade for LS Big Block Chevy engines seeking improved airflow, power, and efficiency. Its unique Hi-Ram design, 105mm runner length, and high-quality aluminum construction make it a must-have for any serious performance enthusiast.

The Holley 300-946 Hi-Ram Intake Plenum for LS Big Block Chevy engines is a popular aftermarket intake system known for its high-performance capabilities. Here are some pros and cons that may help you make an informed decision about purchasing this intake plenum:

1. Enhanced Airflow: The Holley Hi-Ram intake system is designed to provide increased airflow into the engine, which can lead to improved performance and power output.

2. Better Fuel Mixture: The intake system's large-capacity plenum helps to ensure a more uniform fuel-air mixture, which can lead to better combustion and improved engine efficiency.

3. Improved Idle Quality: The Holley Hi-Ram intake system is known for its smooth idle, which can lead to a more pleasant driving experience.

4. Customizable: The Holley Hi-Ram intake system can be customized with various options, such as different throttle body sizes and fuel injector configurations, to suit different performance needs.

5. Durable: The intake system is made of high-quality materials and is designed to withstand the demands of high-performance applications.

1. Complex Installation: The installation of the Holley Hi-Ram intake system can be complex and time-consuming, requiring the removal of the engine's factory intake manifold and other related components.

2. Expensive: The Holley Hi-Ram intake system is more expensive than some other aftermarket intake options, making it a significant investment for many performance enthusiasts.

3. Fuel System Upgrades: In some cases, upgrading the fuel system may be necessary to support the increased airflow and fuel requirements of the Holley Hi-Ram intake system.

4. Potential Tuning Required: Depending on the specific engine and performance goals, tuning may be required to optimize the intake system's performance.

The Holley 300-946 Hi-Ram Intake Plenum is a high-performance aftermarket intake system that can provide significant improvements in airflow, fuel mixture, and idle quality. However, its complex installation, expensive price tag, and potential fuel system upgrades make it a significant investment for performance enthusiasts. Ultimately, the decision to purchase the Holley Hi-Ram intake system depends on your specific performance goals, budget, and installation capabilities.

If you are looking for a high-performance intake system for your LS Big Block Chevy engine and have the budget and installation capabilities to support it, the Holley 300-946 Hi-Ram Intake Plenum is an excellent option to consider. However, if you are looking for a more affordable or less complex intake system, there may be other options available that better suit your needs. It's always a good idea to thoroughly research and consider all options before making a purchase.

Details:

300-946 Holley Hi-Ram Intake Plenum Top, 105MM LS - Big Block Chevy / Small Chevy: Fits Manifolds for. Throttle Cable Bracket is supplied in the kit. Buyer pays return shipping. 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.

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. 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.

part #: 300946 prices

• $224.95-$262.37

specifications inputmanifolds:

• for models: Ram
• for makes: Chevy
• brand: Holley
• part type: Intake Block
• material: Aluminum
• manufacturer part number: 300-946
• manufacturer warranty: Manufacturers Limited 90 Day Warranty
• item height: 7.500
• item length: 23.500
• item width: 12.500
• upc: 090127963432

seller inputmanifolds:

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

payments inputmanifolds:

• wallet: Apple-pay
• credit card: Visa
• other

general inputmanifolds:

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

returns inputmanifolds:

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

shipping inputmanifolds:

• service: UPS Ground
• carrier: UPS
• class: Standard
• type: Fixed
• cost: $0.00
• transit: 3-6 Days

offer inputmanifolds:

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

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