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.4 HEMI Headers Install Guide: Improving Power and Sound on a 2018+ Dodge Charger or Challenger
The 2018+ Dodge Charger and Challenger equipped with the .4 HEMI engine are known for their impressive performance and styling. However, many enthusiasts seek to enhance their vehicle’s power and sound. One popular modification is the installation of headers. This guide will walk you through the process of installing .4 HEMI headers to improve both performance and sound.
Why Upgrade to .4 HEMI Headers?
Upgrading to .4 HEMI headers can provide several benefits, including:
- Increased Horsepower: Headers improve exhaust flow, allowing your engine to breathe better, which can lead to increased horsepower.
- Enhanced Sound: Aftermarket headers can give your vehicle a more aggressive exhaust note, enhancing the driving experience.
- Better Fuel Efficiency: Improved exhaust flow can lead to better fuel efficiency, especially when combined with other performance upgrades.
Tools and Materials Needed
Before beginning the installation, make sure you have the following tools and materials:
- Socket set
- Wrench set
- Torque wrench
- Jack and jack stands
- Header gaskets
- New header bolts
- Safety glasses
- Gloves
Step-by-Step Installation Process
1. Prepare Your Vehicle
Before starting the installation, ensure your vehicle is parked on a flat surface, and the engine is cool. Use the jack to lift the front of the vehicle and secure it with jack stands.
2. Remove the Old Exhaust Manifolds
Start by disconnecting the battery to prevent any electrical issues. Next, remove the old exhaust manifolds:
- Detach the exhaust pipes from the manifolds.
- Unbolt the heat shield (if applicable).
- Remove the bolts securing the manifolds to the engine.
- Carefully pull the manifolds away from the engine.
3. Install the New Headers
With the old manifolds removed, it’s time to install the new headers:
- Place the new header gaskets onto the engine.
- Align the headers with the exhaust ports and gaskets.
- Hand-tighten the header bolts to secure the headers in place.
- Use a torque wrench to tighten the bolts to the manufacturer’s specifications.
4. Reattach the Exhaust System
Once the headers are securely installed, reattach the exhaust system:
- Connect the exhaust pipes to the new headers.
- Ensure all connections are tight and secure.
5. Reconnect the Battery and Test
After everything is reattached, reconnect the battery. Start the engine and listen for any leaks or unusual sounds. Check for leaks around the headers and exhaust connections.
Conclusion
Installing .4 HEMI headers on your 2018+ Dodge Charger or Challenger can significantly enhance performance and sound. With the right tools and careful installation, you can enjoy the benefits of this upgrade. Always remember to follow safety precautions and consult professional help if needed.