Installing 5.7 Hemi Headers: Step-by-step Guide with OEM and Aftermarket Options

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Installing headers on a 5.7 HEMI can significantly enhance performance and improve exhaust flow. This guide will walk you through the process of installing both OEM and aftermarket headers, providing you with the necessary steps and tips to ensure a successful installation.

Tools and Materials Needed

  • Socket set
  • Wrench set
  • Torque wrench
  • Header gaskets
  • Exhaust sealant
  • Jack and jack stands
  • Safety glasses
  • Gloves

Preparation Steps

Before starting the installation, it is crucial to prepare your workspace and vehicle. Follow these steps:

  • Park the vehicle on a flat surface and engage the parking brake.
  • Disconnect the battery to avoid any electrical issues.
  • Raise the vehicle using a jack and secure it with jack stands.
  • Remove the engine cover if applicable.

Removing the Old Headers

To install new headers, you must first remove the old ones. Follow these steps:

  • Remove the exhaust pipes connected to the existing headers.
  • Unbolt the old headers from the cylinder heads, starting from the top bolts.
  • Carefully pull the old headers away from the engine.
  • Inspect the cylinder head surface for any damage or debris.

Installing New Headers

Now that the old headers are removed, you can proceed to install the new ones. Here’s how:

  • Place the new header gaskets onto the cylinder heads.
  • Align the new headers with the gaskets and cylinder heads.
  • Hand-tighten the bolts to secure the headers in place.
  • Using a torque wrench, tighten the bolts to the manufacturer’s specifications.

Connecting the Exhaust System

After the headers are installed, you need to connect the exhaust system:

  • Reconnect the exhaust pipes to the new headers.
  • Ensure all connections are tight and secure.
  • Apply exhaust sealant to any joints as needed.

Final Steps

Once everything is connected, follow these final steps:

  • Reconnect the battery.
  • Start the engine and check for leaks around the headers and exhaust connections.
  • Let the engine run for a few minutes to ensure everything is functioning properly.
  • Lower the vehicle back to the ground.

OEM vs. Aftermarket Headers

When choosing headers, you may opt for OEM or aftermarket options. Here’s a comparison:

  • OEM Headers: Designed specifically for your vehicle, ensuring a perfect fit and reliable performance.
  • Aftermarket Headers: Often provide better performance and customization options, but may require modifications for fitment.

Conclusion

Installing headers on your 5.7 HEMI can be a rewarding project that enhances your vehicle’s performance. By following this step-by-step guide, you can successfully install either OEM or aftermarket headers and enjoy the benefits they provide.