Unleash the potential of your Mercedes S63 with Redstar Exhaust downpipes purpose built for the M177 4.0 twin-turbo V8 in the 2017-2020 S63 W222 Sedan, C218/C217 Coupe, and A218 Cabriolet. Available in Competition Race Use Only, GESI GEN2 400cpsi, and HJS HD 200cpsi catted configurations, these performance exhaust downpipes replace the restrictive factory downpipe section to free up flow. Any configuration can be specified with Redstar's OEM-style integrated heat shielding that cuts radiant heat by up to 80%.

Lower backpressure helps the turbos spool faster for crisper throttle response and noticeable power gains, while the exhaust note deepens with a refined motorsport character. Reducing under-bonnet temperatures helps protect nearby components and supports turbocharger longevity during hard use.

Each Redstar system is engineered for precise fitment as a 100% bolt-on upgrade, using OEM-spec interfaces for hassle-free installation. Constructed from high-quality 2.0mm wall 304 stainless steel and 100% TIG welded and back purged, these downpipes are built for long-term durability and consistent performance. Choose Redstar for a robust, technically focused upgrade that integrates seamlessly with your Mercedes S63.

Available Options

• HJS HD 200cpsi Catalytic Converters: Engineered in Germany and trusted worldwide, the HJS 200cpsi ultra high-performance cats are rated for over 1000hp. Renowned for exceptional flow, durability, and consistent quality, these converters set the benchmark for high-output applications. Ideal for drivers demanding maximum performance without compromise.
• GESI GEN2 400cpsi Catalytic Converters: The latest GEN2 series from GESI is rated to support up to 1000hp while offering smoother exhaust flow and improved efficiency compared with factory units. Featuring advanced emissions technology for optimal catalyst function at high flow rates. A strong choice for those seeking significant performance gains with refined operation.
• OEM-Style Heat Shielding: Redstar's signature thermal management system reduces radiant exhaust heat by up to 80%. Developed with motorsport-inspired materials and construction, it uses a multi-layer design of ceramic insulation and embossed stainless steel foil. Unlike wraps or coatings that degrade quickly, Redstar shielding delivers long-term durability and consistent protection for engine bay components.
• Competition/Catless: Maximum flow design for uncompromised performance. Delivers the most aggressive exhaust note and optimal power gains. Track use only - not for road use.

Key Performance Benefits

• Noticeable power and torque gains from reduced backpressure
• Faster turbo spool and sharper throttle response
• Lower engine bay temperatures for improved component protection
• Helps extend turbocharger life during sustained performance driving
• Richer, more engaging exhaust tone
• True bolt-on installation with straightforward fitment

Technical Specifications

• 2.0mm wall thickness 304 stainless steel construction
• 100% TIG welded and back purged
• OEM-spec flanges
• All brackets and mounts as on the OEM unit

Notes

• LHD/RHD compliant

Fitments

• 2017-2020 Mercedes S63 W222 Sedan M177 4.0 twin-turbo engine
• 2017-2020 Mercedes S63 C218/C217 Coupe M177 4.0 twin-turbo engine
• 2017-2020 Mercedes S63 A218 Cabriolet M177 4.0 twin-turbo engine