MUSTANG XR3EAC Upper Intake Manifold Plenum 9A589

( Brand: Mustang ), ( Type: Intake Manifold ), ( Oe/oem Part Number: Oem ), ( Color: Silver ), ( Manufacturer Part Number: XR3EAC ), ( Material: Aluminum ), ( Placement On Vehicle: Upper ), ( Fuel Type: Gasoline )

Review MUSTANG Upper Intake Manifold Plenum fits 1999–2004

The Ford Mustang XR3i and XR3/S models, produced between 1999 and 2004, feature a unique upper intake manifold plenum with part number 9A589. This crucial engine component is responsible for distributing the incoming air/fuel mixture to the cylinder heads, optimizing the combustion process for enhanced performance.

The upper intake manifold plenum 9A589 is designed with a smooth, cast aluminum construction that ensures a perfect seal and promotes efficient airflow. Its intricate design includes a large, open-flow plenum area, which enables the air/fuel mixture to be evenly distributed to all cylinders, reducing the likelihood of uneven power delivery.

The plenum's design also features integrated ports for the various engine sensors, such as the oxygen sensor, mass air flow sensor, and idle air control valve. These sensors help maintain optimal engine performance by continuously monitoring and adjusting the air/fuel mixture as needed.

The upper intake manifold plenum 9A589 also includes a gasket surface to ensure a proper seal between the manifold and the cylinder heads. The gasket surface is precision machined for a perfect fit and features a raised edge to prevent leaks.

This upper intake manifold plenum is essential for the proper functioning of the Ford Mustang XR3i and XR3/S engines, and its high-quality design guarantees reliable and efficient performance. When it comes time for replacement, this authentic Ford part is the best choice for ensuring optimal engine performance and longevity.

The Ford Mustang XR3/I and XR4 models produced between 1999 and 2004 featured the 4.6L 3V SOHC engine. Upgrading the upper intake manifold (UIM) on these vehicles can lead to improved engine performance. The specific part number for this upgrade is 9A589. In this response, we will discuss the potential advantages and disadvantages of installing a new upper intake manifold (UIM) on a Ford Mustang XR3/I or XR4.

1. Enhanced Airflow: A new UIM can provide better airflow to the engine, potentially improving engine performance and power output.

2. Improved Idle Stability: A new UIM can help improve idle stability, leading to a smoother running engine.

3. Reduced Carbon Build-up: Over time, carbon build-up can occur on the old UIM, which can affect engine performance. A new UIM can help reduce this build-up.

4. Better Fuel Efficiency: With improved airflow and reduced carbon build-up, a new UIM may lead to better fuel efficiency.

1. Cost: The cost of purchasing and installing a new UIM can be significant, especially when factoring in the cost of labor.

2. Installation Complexity: Installing a new UIM can be a complex process, requiring specialized tools and knowledge.

3. Risk of Leaks: During the installation process, there is a risk of gasket leaks, which can lead to engine damage and additional repair costs.

4. Potential for Engine Misfires: If not installed correctly, a new UIM can cause engine misfires, which can further complicate the installation process and require additional repairs.

While upgrading the upper intake manifold on a Ford Mustang XR3/I or XR4 can lead to improved engine performance, increased power output, and potentially better fuel efficiency, the cost, complexity of installation, and potential for leaks and engine misfires are important considerations. Ultimately, the decision to install a new UIM depends on the individual's priorities, budget, and technical expertise. If you are confident in your ability to install the part correctly and are willing to invest in the upgrade, then it may be worth considering. However, if you are unsure about the installation process or the potential costs, it may be wise to consult a professional mechanic for advice.

If you are considering upgrading the upper intake manifold on your Ford Mustang XR3/I or XR4, we recommend thoroughly researching the installation process, gathering all necessary tools and equipment, and considering seeking the assistance of a professional mechanic if you are unsure about your ability to install the part correctly. Additionally, be sure to purchase the new UIM from a reputable supplier to ensure its quality and compatibility with your vehicle.

Details:

Good condition. Removed from a 1999 Mustang GT.

part #: xr3eac prices

• $29.99-$129.00

specifications inputmanifolds:

• for years: 1999-2004
• brand: Mustang
• type: Intake Manifold
• oe/oem part number: Oem
• color: Silver
• manufacturer part number: XR3EAC
• material: Aluminum
• placement on vehicle: Upper
• fuel type: Gasoline

offer inputmanifolds:

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

seller inputmanifolds:

• rating: 100.0%
• # reviews: 412
• city: Tremont, Pennsylvania

returns inputmanifolds:

• time: 14 Days
• policy: Returns Accepted
• paid by: Buyer

general inputmanifolds:

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

payments inputmanifolds:

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

shipping inputmanifolds:

• carrier: UPS
• class: Standard
• service: UPS Ground
• transit: 6-9 Days
• cost: $0.00
• type: Fixed

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