The Mercedes-AMG E63 S W213 is one of the most powerful and refined performance sedans on the market. With its twin-turbocharged 4.0L V8 engine, this high-performance machine delivers exhilarating speed, precision handling, and a luxurious driving experience. However, for those looking to take their AMG to the next level, an aftermarket E63 downpipe is one of the most effective upgrades available.
A performance downpipe enhances exhaust flow, increases horsepower, improves turbo response, and adds an aggressive exhaust note. Whether you own an E63 S W213, S213, C238, or A238, upgrading your downpipes can unleash the full potential of your AMG. In this guide, we’ll explore the benefits of upgrading, the types of downpipes available, and key considerations before making your purchase.
Why Upgrade the Downpipe on Your Mercedes E63 S W213?
The stock downpipes on the E63 S are designed with restrictive catalytic converters that limit exhaust flow to meet emissions regulations. While this is great for compliance, it restricts performance and hinders the true capabilities of the AMG’s twin-turbocharged engine.
Key Benefits of an Upgraded Downpipe
Increased Horsepower and Torque
By reducing exhaust backpressure, an upgraded downpipe for the downpipe Mercedes E63 S w213 allows the turbos to spool faster and more efficiently. This results in significant power gains, especially when paired with an ECU tune.
Improved Turbo Efficiency
The stock downpipes create unnecessary resistance, slowing down turbo spool time. With a high-performance downpipe, the turbos can generate boost more quickly, improving throttle response and acceleration.
Enhanced Exhaust Sound
An aftermarket downpipe dramatically enhances the AMG’s exhaust note, giving it a deeper, throatier, and more aggressive tone. If you want your E63 S to sound as powerful as it performs, this upgrade is a must.
Lower Exhaust Gas Temperatures (EGT)
A more efficient exhaust system helps the engine run cooler, reducing stress on critical components and extending their lifespan.
Better Fuel Efficiency (Under Normal Driving Conditions)
While it may seem counterintuitive, a freer-flowing exhaust can improve fuel efficiency during normal driving, as the engine doesn’t have to work as hard to expel exhaust gases.
Types of Downpipes for the E63 S W213
There are multiple types of downpipes available, and the right choice depends on your goals, driving conditions, and local regulations.
- Catted vs. Catless Downpipes
Catted Downpipes: These downpipes feature high-flow catalytic converters that strike a balance between performance and emissions compliance. They provide excellent gains while preventing the check engine light from coming on.
Catless Downpipes: These eliminate catalytic converters entirely, maximizing power and sound. However, they are intended for off-road or track use, as they may not comply with emissions regulations in many areas.
- Resonated vs. Non-Resonated Downpipes
Resonated Downpipes: Feature additional sound-dampening elements to reduce drone and keep the exhaust note refined.
Non-Resonated Downpipes: Offer the loudest, most aggressive exhaust tone for those seeking a raw, race-inspired sound.
Choosing the Best Downpipe for Your E63 S W213
When shopping for a downpipe for the E63 W213, consider the following factors:
- Material and Build Quality
High-quality stainless steel construction is essential for durability and heat resistance. Look for brands that use precision CNC machining and TIG welding for a perfect fit. BRONDEX is known for manufacturing premium-quality performance downpipes designed for the AMG E63 S.
- ECU Tune Compatibility
Many aftermarket downpipes require an ECU tune to prevent the check engine light from illuminating and to fully optimize performance gains. Pairing your downpipe upgrade with a Stage 2 tune will unlock the most power.
- Legal and Emissions Compliance
If you drive your E63 S on public roads, check your local regulations to ensure your downpipe choice meets emissions standards. Catted downpipes are usually the safer option for street use.
- Installation Considerations
While a skilled DIY mechanic may be able to install a downpipe, professional installation is recommended to ensure proper fitment and to avoid leaks or rattles.
- Trusted Brands
Reputable manufacturers such as BRONDEX, Akrapovič, Weistec, Armytrix, and Fi Exhaust produce high-performance downpipes specifically engineered for the E63 S W213.
Performance Gains from Downpipes
The performance increase from an upgraded E63 W213 downpipe depends on whether you pair it with an ECU tune. Here’s what you can expect:
Stock E63 S W213 (603 HP, 627 lb-ft torque)
With Downpipes Only: +20-40 HP, +30-50 lb-ft torque
With Stage 2 ECU Tune & Downpipes: +80-120 HP, +100-150 lb-ft torque
With supporting mods such as an upgraded intake and intercooler, some tuners have achieved over 800 HP on the E63 S W213 with downpipes and tuning.
Installation and Maintenance Tips
Ensure Proper Fitment: Always choose downpipes specifically designed for the E63 S W213 S213 C238 A238 chassis to avoid fitment issues.
Check for Leaks: After installation, inspect all connections to ensure there are no exhaust leaks, which could lead to poor performance.
Monitor O2 Sensors: If you opt for catless downpipes, you may need O2 sensor spacers or an ECU tune to prevent a check engine light.
Final Thoughts
For AMG enthusiasts looking to enhance their Mercedes E63 S W213, upgrading to a high-performance downpipe is one of the best modifications available. Whether you choose a catted or catless version, the benefits are clear—more power, quicker turbo response, a meaner exhaust note, and lower exhaust temperatures.
Pairing your downpipe with a proper ECU tune will maximize your gains and transform your driving experience. Just be sure to choose a high-quality product from a reputable manufacturer like BRONDEX, consider emissions regulations in your area, and, if necessary, consult a professional for installation.
If you’re ready to unleash the full potential of your AMG, upgrading your downpipes with BRONDEX is the perfect place to start!
