1. Automotive Used Intake Manifolds Items
  2. sku: 9665000586099622
  3. SPEEDMASTER 746-1-148-003

SPEEDMASTER 746-1-148-003 Tube Downdraft Manifold Inection

fits model: Efi.

746-1-148-003 Speedmaster 8 Tube Downdraft Manifold With Fast Efi Inection System

( Brand: Speedmaster ), ( Type: Intake Manifold ), ( Oe/oem Part Number: After Market ), ( Engine Size: 350 In ), ( Manufacturer Part Number: 746-1-148-003 ), ( Features: Unfinished ), ( Placement On Vehicle: Sbc Engine ), ( Fuel Type: Gasoline )

Review SPEEDMASTER Tube Downdraft Manifold Fast Inection System fits EFI

Introducing the Speedmaster 746-1-148-003 Tube Downdraft Manifold, an essential component of your Euro 6 diesel engine's EFI (Electronic Fuel Injection) system. This manifold is meticulously engineered for optimal performance and efficiency, ensuring your vehicle meets the highest emissions standards.

The Speedmaster 746-1-148-003 is a tube downdraft design, meaning the intake runners are arranged in a vertical tube configuration. This design promotes excellent airflow and fuel mixture, leading to improved combustion and reduced emissions. The intake ports are meticulously tuned to ensure an ideal air-fuel ratio, enhancing engine responsiveness and power output.

Made from premium materials, this manifold boasts high-quality tubing with an advanced, corrosion-resistant coating. The coating shields the tubing from harmful elements, ensuring durability and long-lasting performance. The manifold also features a robust, cast-aluminum construction, providing superior strength and heat resistance.

The Speedmaster 746-1-148-003 is designed for seamless integration with your vehicle's existing EFI system. The manifold comes equipped with OEM-style connections, ensuring a hassle-free installation process. The high-precision, CNC-machined ports guarantee a perfect fit, eliminating the need for costly modifications or adapters.

This tube downdraft manifold is manufactured to strict OEM quality standards, ensuring a flawless fit, finish, and function. It is compatible with various Euro 6 diesel engines and is backed by the manufacturer's warranty, providing you with peace of mind and confidence in your purchase.

In summary, the Speedmaster 746-1-148-003 Tube Downdraft Manifold is an exceptional upgrade for your Euro 6 diesel engine's EFI system. Its tube downdraft design promotes improved airflow and fuel mixture, while its premium materials and robust construction ensure durability and long-lasting performance. Seamless integration with your existing system, OEM-style connections, and a flawless fit make this manifold a must-have for any diesel enthusiast.

Pros and Cons of Buying a Speedmaster 746-1-148-003 Tube Downdraft Manifold for EFI Injection

Introduction:

The Speedmaster 746-1-148-003 Tube Downdraft Manifold is a popular aftermarket upgrade for engines using Electronic Fuel Injection (EFI). This manifold offers several advantages over the stock manifold, but it also comes with some potential drawbacks. In this article, we will discuss the pros and cons of buying this manifold.

Pros:

1. Improved Air/Fuel Mixture: The tube downdraft design of the manifold promotes a smoother and more efficient air/fuel mixture, which results in better combustion and increased power.

2. Enhanced Throttle Response: By reducing the length and diameter of the runners, the manifold allows for quicker response to throttle inputs, providing a more responsive driving experience.

3. Improved Engine Appearance: The polished finish and sleek design of the Speedmaster manifold can significantly enhance the appearance of an engine bay.

4. Compatibility: The manifold is compatible with various EFI systems, making it a versatile option for engine upgrades.

Cons:

1. Cost: The Speedmaster manifold is a higher-end aftermarket part and comes with a premium price tag.

2. Installation Complexity: Installing the manifold may require some advanced engine tuning knowledge and skills.

3. Potential for Leaks: The manifold's complex design may increase the likelihood of leaks, which can lead to performance issues and potential damage to the engine.

4. Limited Warranty: The manufacturer's warranty coverage for the manifold may be limited.

Conclusion:

The Speedmaster 746-1-148-003 Tube Downdraft Manifold offers several advantages in terms of power, throttle response, and engine appearance. However, it comes with some potential drawbacks, such as cost, installation complexity, and the risk of leaks. Ultimately, the decision to purchase this manifold depends on your budget, technical skills, and desired performance improvements. If you are comfortable with the installation process and are willing to invest in a high-performance manifold, this could be an excellent upgrade for your engine. However, if you are on a tight budget or prefer a more straightforward installation, you may want to consider other options.

Recommendation:

For those who are serious about engine performance and are looking for a high-quality, tube downdraft manifold, the Speedmaster 746-1-148-003 is a strong contender. Make sure to thoroughly research the installation process and consider the potential costs and risks before making your purchase. Additionally, be sure to choose a reputable supplier to ensure the authenticity and quality of the manifold.

Details:

The 8 tube downdraft manifold with fast EFI injection system by Speedmaster is designed for a small block Chevy engine 265ci, 283ci, 327ci, 350ci and 400ci .This aftermarket intake unfinished suitable sbc. Made for gasoline engines, this manifold is a valuable addition to your car or truck enhanced performance. System has been installed but never started. It features a fast easy 2.0 EFI injection system with ls2 injectors this combination is good to around 500hp the manifold and Efi up 1200hp by enlarging any ls injector will work or you can buy modified ones from FAST, making it ideal for improving air fuel delivery in your vehicle.

All sensors, fuel pump, regulator and corvette return filter with 6 fittings for easier install.

part #: 7461148003 price

  • $1499.00

specifications inputmanifolds:

  • for models: Efi
  • brand: Speedmaster
  • type: Intake Manifold
  • oe/oem part number: After Market
  • engine size: 350 In
  • manufacturer part number: 746-1-148-003
  • features: Unfinished
  • placement on vehicle: Sbc Engine
  • fuel type: Gasoline

seller inputmanifolds:

  • rating: 100.0%
  • # reviews: 35
  • city: Beverly Hills, Florida

payments inputmanifolds:

  • credit card: Visa
  • wallet: Google-pay
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general inputmanifolds:

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

offer inputmanifolds:

  • best offers: True
  • quantity: 1
  • availability: In Stock
  • started: September 24, 2025
  • sold: 0
  • options: Ship-to-home

returns inputmanifolds:

  • policy: No Returns

shipping inputmanifolds:

  • service: UPS Ground
  • transit: 5-12 Days
  • class: Standard
  • cost: $140.74
  • carrier: UPS
  • type: Calculated
for models: efi, type: intake manifold, oe/oem part number: after market, engine size: 350 in, features: unfinished, placement on vehicle: sbc engine, fuel type: gasoline,
category: auto parts > car truck parts accessories > air fuel delivery > intake manifolds, sku: 9665000586099622,

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