Upgrading downpipes on the E63 enhances exhaust flow, increases horsepower, sharpens throttle response, and unleashes a more aggressive exhaust note. This article covers what downpipes are, why they matter, the difference between catless and catted options, and what to expect from the installation process.
What Are Downpipes?
Downpipes are crucial exhaust components in turbocharged engines, connecting the turbochargers to the rest of the exhaust system. mercedes amg gle63 downpipes In stock form, the Mercedes E63 comes equipped with restrictive downpipes designed to meet global emissions standards and noise regulations.
While these factory downpipes are effective at keeping the vehicle compliant, they significantly limit performance. Aftermarket downpipes replace these restrictive parts, increasing exhaust flow, reducing backpressure, and unlocking more of the V8’s raw power.
Benefits of E63 Downpipe Upgrades
1. Substantial Power Gains
One of the primary reasons enthusiasts choose to upgrade downpipes is the performance increase. With improved airflow and a proper ECU tune, gains of 70–100 horsepower are common, taking the E63’s performance to supercar levels.
2. Improved Turbo Response
Turbocharged engines thrive on airflow efficiency. By reducing restrictions, aftermarket downpipes allow the turbos to spool faster, resulting in sharper throttle response and reduced turbo lag.
3. Aggressive Exhaust Note
The stock E63 exhaust is refined, but aftermarket downpipes completely transform the sound. Catless downpipes create a raw, motorsport-inspired tone, while catted options deliver a deep growl that balances performance with refinement.
4. Heat and Efficiency Management
Quality aftermarket downpipes often include thermal coatings or heat shielding. These features reduce engine bay heat, protect nearby components, and in some cases, contribute to small efficiency improvements during normal driving.
Catless vs. Catted Downpipes
When upgrading your E63, you’ll need to decide between catless and catted downpipes:
- Catless Downpipes – Offer maximum performance by eliminating catalytic converters. They provide the most horsepower and sound gains but may trigger check engine lights and are not emissions-compliant in many areas.
- Catted Downpipes – Feature high-flow catalytic converters, providing strong performance improvements while remaining more emissions-friendly. They’re an excellent choice for drivers who want both power and legality for road use.
- Key Considerations Before Installation
Legal and Emissions Compliance
Before choosing your downpipes, check your local regulations. Many regions require catalytic converters for road use, meaning catted downpipes may be the only street-legal option.
ECU Tuning
A downpipe upgrade should always be paired with an ECU tune. Not only does this maximize performance gains, but it also ensures your car runs smoothly without throwing error codes.
Professional Installation
Downpipe installation is complex. It involves removing heat shielding, sensors, and factory exhaust components before fitting the new pipes. For best results, a professional installation is recommended to ensure proper alignment and leak-free operation.
Installation Process
Installing aftermarket downpipes on a Mercedes E63 typically takes 6–8 hours at a professional workshop. The process includes:
- Lifting the car and accessing the exhaust system.
- Removing the stock downpipes, sensors, and heat shields.
- Installing the new aftermarket units with proper alignment.
- Reattaching oxygen sensors and ensuring all connections are secure.
- Running diagnostics and testing performance after installation.
Once complete, the E63 feels instantly more powerful, responsive, and aggressive in both tone and performance.
Conclusion
A mercedes e63 downpipe install is one of the most effective performance upgrades for AMG enthusiasts. By improving exhaust flow, you unlock substantial horsepower gains, quicker turbo response, and a far more engaging exhaust sound.
Whether you choose catless downpipes for maximum performance or catted downpipes for balanced power and compliance, this upgrade transforms your driving experience. Pairing the installation with a professional ECU tune ensures you fully unlock the E63’s hidden potential, making every drive more thrilling.
