Table of Contents
Installing an APR Stage III kit on your B5 S4 can significantly enhance its performance, pushing it to over 500 horsepower. This guide provides a detailed, step-by-step approach to help you through the installation process.
Tools and Materials Needed
- APR Stage III Kit
- Socket set
- Torque wrench
- Flathead and Phillips screwdrivers
- Wire cutters and strippers
- Electrical tape
- Coolant
- Oil
- Shop towels
Preparation Steps
Before starting the installation, ensure you have a clean working environment and all necessary tools at hand. It’s also advisable to read through the APR installation manual for specific instructions related to your kit.
1. Safety First
Always wear safety goggles and gloves while working on your vehicle. Ensure the car is parked on a flat surface and the engine is cool before beginning.
2. Disconnect the Battery
Start by disconnecting the negative terminal of the battery to prevent any electrical shorts during the installation process.
Removing the Stock Components
To install the APR Stage III kit, you will need to remove several stock components from your B5 S4.
1. Remove the Engine Cover
Unscrew the bolts securing the engine cover and carefully lift it off. Set it aside in a safe location.
2. Disconnect the Intake System
Loosen the clamps on the intake hoses and remove the intake system from the throttle body. Keep all components together for reinstallation.
3. Remove the Stock Turbochargers
Carefully disconnect the turbochargers from the exhaust manifold and remove them from the engine bay. This may require loosening several bolts and removing associated hoses.
Installing the APR Stage III Kit
With the stock components removed, you can now begin the installation of the APR Stage III kit.
1. Install the New Turbochargers
Position the new turbochargers in place and secure them to the exhaust manifold using the supplied bolts. Ensure all connections are tight and leak-free.
2. Connect the Intake System
Attach the new intake system to the turbochargers and throttle body. Make sure to tighten the clamps securely.
3. Install the Intercooler
Mount the new intercooler in the designated area, making sure it is properly secured. Connect all necessary hoses and clamps.
4. Update the ECU
Reprogram your ECU using the APR tuning software to ensure optimal performance with the new Stage III components. Follow the instructions provided with the kit for this process.
Final Steps
After the installation is complete, there are a few final steps to ensure everything is functioning correctly.
1. Reconnect the Battery
Reconnect the negative terminal of the battery and ensure all connections are secure.
2. Check Fluid Levels
Check and top off all fluids, including oil and coolant, as necessary. This is crucial for the longevity of your vehicle.
3. Start the Engine
Start the engine and let it idle. Listen for any unusual sounds and check for leaks around the installed components.
4. Take a Test Drive
Once everything checks out, take your B5 S4 for a test drive to experience the enhanced performance of the APR Stage III kit. Monitor the gauges and ensure everything is functioning correctly.
Conclusion
Installing an APR Stage III kit on your B5 S4 is a rewarding project that can lead to impressive power gains. By following this guide, you can ensure a successful installation and enjoy the benefits of your upgraded vehicle.