The Mercedes-AMG GT63 is a monstrous machine, but for the driving enthusiast, there’s always a thirst for more. Downpipes are a well-regarded performance upgrade for the GT63 (including the GT63S and x290 variant) that can unlock hidden potential and elevate your driving experience to new heights.

What are Downpipes and How Do They Work?

GT 63s Downpipes are the initial section of the exhaust system that channels exhaust gases away from the turbochargers and towards the catalytic converters. Stock downpipes, while functional, are often designed with a balance of performance and emissions in mind. This can mean they have restrictions that hinder exhaust flow, creating a bottleneck for performance.

Upgrading to a high-flow downpipe replaces this restriction with a wider, smoother passage. This allows exhaust gases to escape more efficiently, reducing backpressure on the turbos. Think of it like giving your turbos more breathing room. By reducing this resistance, the turbos can spool up quicker and operate more efficiently, resulting in a surge of performance.

Benefits of Downpipes for Your AMG GT63:

Horsepower and Torque Gains: Improved exhaust flow translates to faster turbo spool-up and quicker response, resulting in noticeable increases in horsepower and torque. This translates to a more thrilling acceleration experience and a potential edge on the track.
Enhanced Throttle Response: The reduced backpressure allows the engine to respond more immediately to your inputs. This translates to a sharper, more connected feel that puts you in better control and adds to the exhilaration of driving the GT63.
Foundation for Further Tuning: Downpipes can be a stepping stone for further performance modifications. With the improved exhaust flow, other performance upgrades like performance air intake systems and ECU tuning can have a more pronounced effect.
Improved Exhaust Note (Optional): Some downpipes are designed to not only improve performance but also alter the exhaust note. These downpipes can add a deeper, more aggressive tone that accentuates the AMG character of your GT63.

Important Considerations Before Upgrading:

Legality: Downpipes may not be street-legal in all regions due to emissions regulations. Stricter emissions laws in some areas might have limitations on modifications that alter exhaust flow. Check your local laws before modifying your exhaust system to avoid any legal trouble.
Check Engine Light (CEL): Depending on the downpipe design and your vehicle’s emissions controls, you might experience a Check Engine Light (CEL). This is because the car’s computer might detect changes in exhaust flow parameters. Tuning solutions like ECU remaps can often address this by adjusting the engine control unit to recognize the new parameters of the downpipe.
Professional Installation: Downpipe installation typically requires some mechanical expertise. The process involves removing the stock downpipes, navigating tight engine bay spaces, and ensuring a proper fit with the new downpipes. While some experienced DIY mechanics might tackle the installation themselves, for most drivers, professional installation is recommended to ensure a proper fit and avoid any leaks or complications.

Popular Downpipe Brands for Mercedes-AMG GT63:

Brondex Exhaust Systems: Known for their high-quality, 304 stainless steel downpipes that offer a balance of performance gains and a deep exhaust note.
Milltek Sport: Offers high-flow downpipes machined from T-304 stainless steel and TIG-welded for a strong and reliable construction.
TurboWorks: Provides downpipes designed for improved performance with features like heat shields to manage underhood temperatures.
Supersprint: Supersprint downpipes might be available for the GT63, but availability can vary depending on region and supplier. It’s advisable to check with performance parts retailers to confirm availability and compatibility for your specific model.
Remember: Modifying your car can impact its warranty and performance. Carefully research downpipes and their potential effects on your car’s warranty, emissions compliance, and overall performance before making a decision. Consulting with a qualified mechanic or performance shop familiar with the AMG GT63 platform can be helpful in making an informed decision.