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The APR Stage 2 Kit for the B8 S4 is a popular modification for enthusiasts looking to enhance their vehicle’s performance. This article will guide you through the installation process, provide a detailed cost breakdown, and share the power results you can expect after the upgrade.
What is the APR Stage 2 Kit?
The APR Stage 2 Kit is designed to significantly increase the horsepower and torque of your B8 S4. It includes a high-flow intake, upgraded intercooler, and a performance ECU tune. This kit is perfect for those looking to maximize their vehicle’s potential without compromising reliability.
Tools and Materials Needed
- Socket set
- Torque wrench
- Screwdrivers (flathead and Phillips)
- Wrenches
- APR Stage 2 Kit components
- Cooling system tools
- Safety glasses
- Gloves
Installation Steps
Step 1: Preparation
Before starting the installation, ensure that your vehicle is parked on a flat surface and the engine is cool. Gather all the tools and materials needed for the installation.
Step 2: Remove the Stock Components
Begin by removing the stock intake system. Disconnect the mass airflow sensor and any hoses attached to the intake. Use your socket set to remove the bolts securing the intake to the engine.
Next, remove the stock intercooler by disconnecting the hoses and bolts. Be careful to catch any coolant that may spill during this process.
Step 3: Install the APR Components
Install the high-flow intake by securing it in place with the provided bolts. Reconnect the mass airflow sensor and hoses. Ensure all connections are tight to prevent any leaks.
Next, install the upgraded intercooler. Make sure to connect all hoses and secure the intercooler with the supplied hardware.
Step 4: ECU Tune
After all hardware is installed, it’s time to upload the APR Stage 2 ECU tune. Follow the instructions provided with the kit to connect your vehicle to the tuning software.
Step 5: Final Checks
Once the ECU tune is uploaded, double-check all connections and bolts to ensure everything is secure. Start the engine and listen for any unusual noises. Check for leaks around the intake and intercooler.
Cost Breakdown
Here’s a breakdown of the costs associated with the APR Stage 2 Kit installation:
- APR Stage 2 Kit: $2,500
- Tools (if not owned): $200
- Labor (if not DIY): $500
- Miscellaneous (fluids, etc.): $100
Total Estimated Cost: $3,300
Power Results
After installing the APR Stage 2 Kit, you can expect significant gains in power. Here are the typical results:
- Horsepower: Increased from 333 to approximately 400 HP
- Torque: Increased from 325 to approximately 400 lb-ft
Conclusion
Installing the APR Stage 2 Kit on your B8 S4 is a rewarding project that can elevate your driving experience. With the right tools and a bit of patience, you can achieve impressive performance gains while enjoying the process of upgrading your vehicle.