HOLLEY EFI 300-301 Top Cast Mount Plenum 090127066362 105MM

( Brand: Holley Efi ), ( Part Type: Mount ), ( Material: Aluminum ), ( Manufacturer Part Number: 300-301 ), ( Color: Natural ), ( UPC: 090127066362 )

Review HOLLEY EFI Hi ram 105mm Cast Side Mount Plenum Top fits RAM

The Holley EFI 300-301 Hi-Ram 105mm Cast Mount Plenum Top is a high-performance intake manifold designed for serious racers and enthusiasts seeking maximum power and efficiency from their fuel-injected engine. This intake manifold is part of Holley's EFI Hi-Ram series and is specifically designed to work with 105mm throttle bodies.

The 300-301 features a large, cast-aluminum plenum design that provides excellent flow characteristics and increased air charge velocity, leading to improved power and torque across the entire RPM range. The Hi-Ram design also allows for increased runner length and volume, which can help to reduce intake manifold pressure drops and improve overall engine efficiency.

The intake runners are precision-machined to ensure a perfect fit with Holley's 350, 4150, and 4160 series carburetor-style throttle bodies, as well as Holley's EFI throttle bodies. The manifold top also includes integrated fuel rails, which are designed to accommodate Holley's High-Flow or Sniper EFI fuel systems.

The 105mm casting size of this intake manifold is ideal for larger engines, such as big-block Chevy, Ford, and Chrysler applications. The manifold top is also compatible with both natural aspirated and forced-induction applications, making it a versatile choice for a wide range of performance builds.

The Holley EFI 300-301 Hi-Ram 105mm Cast Mount Plenum Top is designed to provide excellent durability and reliability, with a robust construction that can withstand the demands of high-performance applications. The manifold top is also fully EO Dyno tested to ensure optimal performance and ensure that it meets Holley's rigorous quality standards.

In summary, the Holley EFI 300-301 Hi-Ram 105mm Cast Mount Plenum Top is a high-performance intake manifold designed for serious racers and enthusiasts seeking maximum power and efficiency from their fuel-injected engine. Its large cast-aluminum plenum design, precision-machined runners, and compatibility with a wide range of throttle bodies make it an excellent choice for big-block Chevy, Ford, and Chrysler applications, as well as other high-performance builds.

The Holley EFI 300-301 hi-ram 105mm cast mount plenum top is a fuel injection system designed for use in high-performance applications. This system offers several advantages and disadvantages, which are highlighted below:

1. Improved Fuel Delivery: Holley EFI systems are known for their ability to deliver precise fuel delivery, which is essential for optimal engine performance. The 300-301 hi-ram fuel injection system offers improved fuel atomization and distribution, which can lead to better combustion and increased power.

2. Adjustability: The Holley EFI system is highly adjustable, allowing users to fine-tune the fuel delivery to suit their specific engine setup. This can lead to improved performance and better fuel economy.

3. Easy Installation: The cast mount plenum top design makes installation easier, as it can be bolted directly to the intake manifold. This can save time and money compared to other fuel injection systems that require more extensive modifications.

4. Wide Compatibility: The Holley EFI 300-301 system is compatible with a wide range of engines and applications, making it a versatile choice for many high-performance enthusiasts.

1. Cost: The Holley EFI system is more expensive than traditional carburetors or other basic fuel injection systems. The cost may be a barrier for some enthusiasts who are working on a budget.

2. Complexity: The Holley EFI system is more complex than a carburetor, which can make it more difficult to troubleshoot and diagnose issues. It may require more technical expertise to install and tune the system properly.

3. Electrical Requirements: The Holley EFI system requires a reliable electrical system to function properly. This may involve upgrading the wiring and ignition system, which can add to the cost and complexity of the installation.

The Holley EFI 300-301 hi-ram 105mm cast mount plenum top is a high-performance fuel injection system that offers several advantages, including improved fuel delivery, adjustability, ease of installation, and wide compatibility. However, it also comes with some disadvantages, such as cost, complexity, and electrical requirements.

If you are looking for maximum performance and the ability to fine-tune your engine's fuel delivery, the Holley EFI system may be worth the investment. However, if you are working on a budget or are not comfortable with the complexity of the system, a traditional carburetor or a less expensive fuel injection system may be a better choice. Ultimately, the decision to purchase the Holley EFI system should be based on your specific needs, budget, and technical expertise.

Details:

X000D Lid has been verified to fit under Servings 2.5 cowl hood on 1979-1993 Mustangs with 351W 302W Hi-Ram bases when using motor mounts that retain stock engine locations. The cast aluminum side mount plenum tops resemble the older Ford EFI manifolds and will allow you to throttle body on. This will allow for easier fabrication boosted applications or just a different look on your Hi-Ram manifold.Cast aluminum construction designed to mount our existing manifold bases. Model's for 86-95 Ford 5.0 throttle body patterns in 95mm and 105mm sizes.

300-301 HI-RAM 105MM Cast Side Mount Plenum Top: Finish 86-95 Ford 5.0 throttle body patterns. HI-RAM 105MM Cast aluminum Side Mount Plenum Top for EFI Hi-Ram Manifolds Holley now has cast plenum top options those of us with limited room in the front our engines. Buyer pays return shipping. Available in cast or black finish.

part #: 300301 prices

• $430.95-$443.60

specifications inputmanifolds:

• for models: Ram
• brand: Holley Efi
• part type: Mount
• material: Aluminum
• manufacturer part number: 300-301
• color: Natural
• upc: 090127066362

seller inputmanifolds:

• # reviews: 14272
• rating: 98.8%
• city: Bowling Green, Kentucky

offer inputmanifolds:

• started: March 12, 2025
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home

general inputmanifolds:

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

returns inputmanifolds:

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

shipping inputmanifolds:

• class: Standard
• type: Fixed
• service: UPS Ground
• cost: $0.00
• transit: 3-8 Days
• carrier: UPS

payments inputmanifolds:

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

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