Table of Contents
The BMW 335i is a popular choice among car enthusiasts, especially those looking to enhance performance. One of the most effective modifications is the installation of a downpipe. In this guide, we will walk you through the DIY installation of the VRSF downpipe on your BMW 335i, providing step-by-step instructions and discussing the performance results you can expect.
What is a Downpipe?
A downpipe is a crucial component of a vehicle’s exhaust system. It connects the turbocharger to the rest of the exhaust system and is responsible for expelling exhaust gases. Upgrading to a high-performance downpipe, like the VRSF, can significantly reduce back pressure, improve turbo spool time, and increase horsepower.
Tools and Materials Needed
- VRSF Downpipe
- Socket set (including 10mm, 13mm, and 15mm sockets)
- Torque wrench
- Ratchet wrench
- Extension bars
- Flathead and Phillips screwdrivers
- Jack and jack stands
- Safety glasses
- Gloves
- Exhaust gasket (optional)
Preparation Steps
Before beginning the installation, ensure that your vehicle is parked on a flat surface and the engine is cool. Wear safety glasses and gloves to protect yourself during the process. Gather all tools and materials to have everything within reach.
Step-by-Step Installation Guide
Step 1: Lift the Vehicle
Using a jack, lift the front of the BMW 335i and secure it with jack stands. Ensure that the vehicle is stable before proceeding.
Step 2: Remove the Undertray
Locate the undertray beneath the vehicle. Use the appropriate socket to remove the screws or bolts holding it in place. Set the undertray aside for reinstallation later.
Step 3: Disconnect the Exhaust System
Locate the connection point where the downpipe meets the rest of the exhaust system. Use the ratchet and the appropriate socket to loosen and remove the bolts. Carefully slide the exhaust system off the downpipe.
Step 4: Remove the Stock Downpipe
Next, locate the bolts securing the stock downpipe to the turbocharger. Use the socket set to remove these bolts. Once loosened, carefully remove the stock downpipe from the vehicle. You may need to maneuver it slightly to free it from the turbo.
Step 5: Install the VRSF Downpipe
Position the VRSF downpipe into place, aligning it with the turbocharger. Secure it using the bolts you previously removed. Ensure that it is fitted snugly and correctly aligned.
Step 6: Reconnect the Exhaust System
Reattach the exhaust system to the VRSF downpipe. Make sure to tighten the bolts securely to prevent any leaks. Use a torque wrench to ensure they are tightened to the manufacturer’s specifications.
Step 7: Reinstall the Undertray
Once everything is connected, reinstall the undertray by securing it with the screws or bolts you removed earlier. Ensure it is firmly in place.
Step 8: Lower the Vehicle
Carefully remove the jack stands and lower the vehicle back to the ground. Ensure everything is secure before starting the engine.
Performance Results
After the installation of the VRSF downpipe, many BMW 335i owners report noticeable improvements in performance. Here are some common results:
- Increased horsepower and torque
- Improved turbo response and spool time
- Enhanced exhaust sound
- Better throttle response
Conclusion
Installing the VRSF downpipe on your BMW 335i is a rewarding DIY project that can lead to significant performance gains. By following this step-by-step guide, you can enhance your vehicle’s capabilities while enjoying the satisfaction of completing the installation yourself. Always remember to drive responsibly and enjoy the improvements!