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The NA Miata is a beloved sports car known for its lightweight design and engaging driving experience. One of the best ways to enhance its performance is through a DIY intake and header installation. Not only can this modification save you money, but it can also add around 12 horsepower to your ride. In this article, we will guide you through the steps necessary to complete this upgrade.
Understanding the Benefits of Upgrading Your Intake and Header
Before diving into the installation process, it’s essential to understand why upgrading your intake and header is beneficial:
- Improved Airflow: A performance intake allows for better airflow into the engine, which can enhance combustion efficiency.
- Increased Power: Replacing the stock header with a performance header can significantly improve exhaust flow, leading to increased horsepower.
- Better Sound: A new header can change the exhaust note, giving your Miata a sportier sound.
- Cost-Effective Performance: DIY installations save on labor costs, making it an affordable way to boost performance.
Tools and Materials Needed
To successfully complete the intake and header installation, gather the following tools and materials:
- Socket set (including extensions)
- Wrenches
- Torque wrench
- Flathead and Phillips screwdrivers
- Jack and jack stands
- Performance intake kit
- Aftermarket header
- Gasket maker or new gaskets
- Safety glasses and gloves
Step-by-Step Installation Guide
Preparation
Before starting the installation, ensure that your Miata is parked on a level surface, and you have all the necessary tools and parts ready. Disconnect the battery to prevent any electrical issues during the installation process.
Removing the Stock Intake
Follow these steps to remove the stock intake:
- Locate the airbox and remove the screws or clamps holding it in place.
- Disconnect the mass airflow sensor (MAF) connector.
- Remove the intake duct from the throttle body.
- Take out the entire airbox assembly.
Installing the Performance Intake
Once the stock intake is removed, install the performance intake by following these steps:
- Attach the new intake tube to the throttle body, ensuring a secure fit.
- Connect the MAF sensor to the new intake tube.
- Secure the intake filter in place, making sure it is properly sealed.
- Double-check all connections and ensure there are no leaks.
Removing the Stock Header
Next, you will need to remove the stock header:
- Raise the car using a jack and secure it with jack stands.
- Remove the exhaust pipe connected to the header.
- Unbolt the header from the engine block, taking care to keep track of the bolts.
- Remove the old header from the vehicle.
Installing the Aftermarket Header
With the stock header removed, install the new aftermarket header:
- Position the new header in place and align it with the engine block.
- Secure the header with the original bolts or new ones if provided.
- Reattach the exhaust pipe to the new header.
- Use a torque wrench to ensure all bolts are tightened to the manufacturer’s specifications.
Final Checks and Testing
After the installation is complete, perform the following checks:
- Reconnect the battery.
- Start the engine and listen for any unusual sounds.
- Check for any leaks around the intake and header.
- Take the car for a test drive to feel the performance improvements.
Conclusion
Upgrading the intake and header on your NA Miata is a rewarding project that can enhance your driving experience significantly. With some basic tools and a bit of time, you can save money and gain approximately 12 horsepower. Enjoy the improved performance and the satisfaction of completing a DIY project!