Unleash a richer soundtrack and sharper response from your Mercedes CLS500 / CLS550 AMG C218 W218 and E500 / E550 AMG W212 with Redstar performance exhaust downpipes engineered for the M278 4.7 twin-turbo engine. Designed specifically for 2011-2018 CLS500 / CLS550 and 2011-2017 E500 / E550 applications, these Redstar downpipes replace the factory downpipes for a direct, bolt-on upgrade that elevates both performance and character.

The free-flowing 3 inch layout improves exhaust velocity, delivering faster turbo spool, crisper throttle response and significant power gains, while adding a deeper and more exotic tone. Optional OEM-style heat shielding can cut radiant exhaust heat by up to 80%, aiding thermal control around sensitive engine bay components. High-performance catalytic converter options include HJS HD 200cpsi and GESI GEN2 400cpsi, both designed to support high-output builds with improved flow over stock.

Built to RedstarÕs exacting standards, each system uses 2.0mm wall 3 inch 304 stainless steel, is 100% TIG welded and back purged, and features OEM-spec flanges with factory-style brackets for a precise seal and long-term durability. Compatible with both LHD and RHD vehicles, this is a true bolt-on performance exhaust solution that integrates cleanly and delivers the unmistakable Redstar sound.

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.

Key Performance Benefits

• Significant power gains
• Faster turbo spool and sharper throttle response
• Helps extend turbocharger life through improved thermal control
• Reduced under-bonnet temperatures
• Deeper, more engaging exhaust tone
• True bolt-on installation for straightforward fitment

Technical Specifications

• 2.0mm wall, 3 inch 304 stainless steel construction
• 100% TIG welded and back purged
• OEM-spec flanges
• All brackets and mounts as on the OEM unit
• Compatible with LHD and RHD vehicles

Fitments

• 2011-2018 Mercedes CLS500 / CLS550 AMG C218 W218 M278 4.7 twin-turbo engine
• 2011-2017 Mercedes E500 / E550 AMG W212 M278 4.7 twin-turbo engine