Table of Contents
Installing WRX headers can significantly enhance your vehicle’s performance. This guide provides a detailed, step-by-step process for installing both GrimmSpeed and Invidia headers on your WRX.
Tools and Materials Needed
- Socket set
- Torque wrench
- Ratchet and extensions
- Flathead and Phillips screwdrivers
- Gasket scraper
- New gaskets
- Anti-seize compound
- Safety glasses
- Gloves
Preparation Steps
Before beginning the installation process, make sure your vehicle is parked on a flat surface and the engine is cool. Gather all the tools and materials listed above to ensure a smooth installation.
Disconnect the Battery
Start by disconnecting the negative terminal of the battery to prevent any electrical issues during the installation.
Raise the Vehicle
Using a jack and jack stands, raise the vehicle to access the underside. Ensure the vehicle is secure before proceeding.
Removing the Old Headers
Once the vehicle is secure, you can begin removing the old headers. Follow these steps carefully.
Remove the Exhaust System
Start by unbolting the exhaust system from the headers. This may involve removing hangers and clamps. Keep track of all bolts and components.
Unbolt the Old Headers
Next, unbolt the old headers from the engine. Use a socket wrench to remove the bolts, and be cautious of any remaining gaskets that may be stuck.
Clean the Surface
After removing the old headers, clean the mating surface on the engine block thoroughly using a gasket scraper. This will ensure a proper seal for the new headers.
Installing the New Headers
With the old headers removed and the surface cleaned, you can now install the new GrimmSpeed or Invidia headers.
Apply Anti-Seize Compound
Before installing the new headers, apply a small amount of anti-seize compound to the threads of the bolts. This will help prevent them from seizing in the future.
Install the New Headers
Position the new headers onto the engine block, aligning them with the bolt holes. Hand-tighten the bolts to hold them in place.
Tighten the Bolts
Using a torque wrench, tighten the header bolts to the manufacturer’s specifications. Ensure that you follow a crisscross pattern for even tightening.
Reassemble the Exhaust System
Once the headers are securely in place, you can reassemble the exhaust system.
Reconnect the Exhaust System
Reconnect the exhaust system to the new headers, ensuring all clamps and hangers are properly secured.
Check for Leaks
Before lowering the vehicle, start the engine and check for any exhaust leaks around the headers and exhaust connections. If you notice any leaks, tighten the bolts as necessary.
Final Steps
With everything reassembled, you can now lower the vehicle and reconnect the battery.
Reconnect the Battery
Reconnect the negative terminal of the battery and ensure it is secured properly.
Test Drive
Take your WRX for a test drive to experience the improved performance. Pay attention to any unusual sounds or vibrations that may indicate a problem.
Conclusion
Installing WRX headers from GrimmSpeed or Invidia can enhance your vehicle’s performance and sound. By following this step-by-step guide, you can successfully install your new headers and enjoy the benefits that come with them.