FAST 54039B LSX Black 92mm Intake Manifold User Manual

1. Product Overview

The FAST 54039B LSX Black 92mm Intake Manifold is engineered for GM Gen III (LS1, LS2, and LS6) engines. This patented three-piece composite manifold is designed to enhance engine performance by delivering increased airflow without compromising low-end drivability or high RPM power. It is specifically designed to integrate with the FAST Big Mouth 92mm throttle body.

Key features include corrosion-free stainless steel assembly bolts, an improved throttle body sealing flange with an O-ring gasket, and threaded insert throttle body mounts for enhanced durability and a secure fit.

Image 1.1: Angled view of the FAST 54039B LSX Black 92mm Intake Manifold.

2. Installation Guide

The FAST 54039B LSX Black 92mm Intake Manifold is designed for straightforward bolt-on installation on compatible GM Gen III engines. While it offers significant performance gains out of the box, it can also be ported by a qualified professional for further optimized airflow.

2.1 Pre-Installation Checks

• Ensure all engine components are clean and free of debris.
• Verify compatibility with your specific GM Gen III engine (LS1, LS2, or LS6).
• Confirm you have the necessary tools and a FAST Big Mouth 92mm throttle body for optimal fitment.

2.2 Installation Steps (General)

1. Carefully remove the existing intake manifold, following your vehicle's service manual procedures.
2. Clean the cylinder head intake ports and mating surfaces thoroughly.
3. Position the new FAST LSX intake manifold, ensuring proper alignment with the cylinder head ports.
4. Install the corrosion-free stainless steel assembly bolts, tightening them to the manufacturer's specified torque sequence and values.
5. Attach the FAST Big Mouth 92mm throttle body to the manifold, utilizing the improved sealing flange, O-ring gasket, and threaded insert mounts.
6. Reconnect all vacuum lines, sensors, and fuel system components.
7. Perform a final inspection to ensure all connections are secure and there are no leaks.

Image 2.1: Front view of the FAST LSX 92mm Intake Manifold, highlighting the throttle body opening.

3. Operation

Once installed, the FAST 54039B LSX Black 92mm Intake Manifold operates as a critical component of your engine's air induction system. Its design ensures efficient air delivery to the cylinders, contributing to improved engine performance across the RPM range. The manifold is engineered to maintain excellent drivability and low RPM torque while providing significant power gains at higher engine speeds.

4. Maintenance

To ensure the longevity and optimal performance of your FAST LSX Intake Manifold, periodic inspection and maintenance are recommended.

• Regular Inspection: Periodically check the manifold for any signs of damage, cracks, or loose connections. Ensure all bolts remain properly torqued.
• Gasket Integrity: Inspect the throttle body O-ring gasket and other sealing surfaces for wear or degradation. Replace gaskets as needed to prevent vacuum leaks.
• Cleaning: Keep the exterior of the manifold clean. If necessary, clean the interior passages during major engine service, ensuring no foreign objects or debris are introduced into the engine.

5. Troubleshooting

Should you encounter any issues after installation, consider the following general troubleshooting steps:

• Vacuum Leaks: If the engine experiences rough idling or poor performance, check for vacuum leaks around the manifold and throttle body gaskets. A common method is to spray a small amount of unlit propane or carburetor cleaner around the suspected areas while the engine is running; a change in engine RPM indicates a leak.
• Loose Connections: Ensure all sensors, vacuum lines, and fuel lines connected to the manifold are securely attached.
• Throttle Body Alignment: Verify that the throttle body is correctly aligned and sealed to the manifold.
• Professional Assistance: For persistent or complex issues, it is recommended to consult a qualified automotive technician.

6. Specifications

7. Warranty and Support

For information regarding product warranty, technical support, or replacement parts, please contact FAST customer service directly. Keep your purchase receipt and product model number (54039B) readily available when contacting support.

You can typically find contact information on the official FAST website or through your product retailer.