The Mercedes E63 is a high-performance luxury sedan that’s already a beast on the road. But for enthusiasts who want to take their ride to the next level, one of the most impactful upgrades is a downpipe install. This seemingly simple modification can significantly enhance the power, sound, and efficiency of the vehicle. In this article, we’ll explore the benefits of a Mercedes E63 downpipe install, the installation process, and things to keep in mind before upgrading.
What Is a Downpipe?
A downpipe is a component of your car’s exhaust system that connects the turbocharger to the rest of the exhaust. In stock vehicles, downpipes often include a catalytic converter that can restrict exhaust flow. An aftermarket downpipe, especially a high-flow or catless version, reduces backpressure and allows exhaust gases to exit more freely. This results in improved turbo spool times, better airflow, and a noticeable increase in horsepower and torque.
Benefits of Installing a Downpipe on the Mercedes E63
1. Increased Horsepower and Torque
The E63 AMG is already a powerful machine, but replacing the restrictive stock downpipe with a performance unit can yield gains of 30-60 horsepower, especially when paired with a proper ECU tune. This unlocks the full potential of the car’s twin-turbocharged V8 engine.
2. Better Turbo Response
One of the biggest advantages of a downpipe upgrade is the reduced turbo lag. Since the exhaust gases flow more freely, the turbochargers spool faster, giving the driver quicker throttle response and more usable power throughout the RPM range.
3. Improved Exhaust Note
Many owners appreciate the more aggressive exhaust sound after a downpipe install. It enhances the deep growl of the V8, making the car sound as fast as it feels. A catless downpipe will be louder, while a high-flow catted version strikes a balance between performance and sound.
4. Support for Other Mods
If you’re planning more upgrades like a larger turbo, intercooler, or custom tuning, an upgraded downpipe is an essential supporting mod. It improves airflow and helps the engine breathe better, maximizing the performance of all future modifications.
Installation Overview
Installing a downpipe on a Mercedes E63 requires mechanical expertise and access to proper tools or a professional workshop. Here’s a simplified breakdown of the process:
- Preparation: Lift the vehicle securely, and disconnect the battery. Allow the engine and exhaust system to cool completely.
- Remove Existing Components: The heat shields, underbody panels, and stock downpipe must be removed carefully. Be sure to label or photograph connections for reference.
- Install New Downpipe: Fit the aftermarket downpipe in place, ensuring a proper seal and alignment with the rest of the exhaust system. Most aftermarket kits come with necessary gaskets and mounting hardware.
- Reassembly: Reinstall the heat shields, panels, and reconnect the sensors. Double-check all bolts and clamps for tightness.
- Tuning: It’s highly recommended to pair a downpipe upgrade with ECU tuning. Without proper software adjustments, the car may throw check engine lights or run inefficiently.
Legal and Warranty Considerations
Before performing a Mercedes E63 downpipe install, be aware of local emissions regulations. In some regions, removing or replacing the catalytic converter may be illegal for street use. Also, installing aftermarket performance parts can void your vehicle’s warranty, so check with your dealer or manufacturer.
Final Thoughts
A downpipe upgrade is one of the most cost-effective ways to significantly improve the performance and sound of your Mercedes E63. Whether you’re looking for quicker acceleration, a throatier exhaust note, or a platform for future mods, a quality downpipe delivers noticeable benefits. Just remember to pair it with a reliable tune and choose a reputable brand for optimal results.