Redstar Mercedes M256 GEN1 Downpipe

Description

Unleash performance on your Mercedes M256 GEN 1 3.0 in-line turbo platform with the Redstar downpipe - precisely engineered for E53/E450 W213/C238, CLS450/CLS53 C257, GT43/GT53/GT50 X290, GLE53/GLS450/GLE450 W167 V167, and S-Class models including S450/S500 W222 and S400/S450/S450e/S480/S500/S580e W223. This performance exhaust upgrade replaces the factory downpipe section and features a big-bore 3.5 in U-bend that tapers to an OEM-spec connection for seamless integration with the stock system.

Developed using advanced 3D scanning and reverse engineering, the flow-optimised geometry uses a long 3.5 in OD section with smooth transitions to 3 in, reducing back pressure to promote faster turbo spool and sharper throttle response. Optional OEM-style heat shielding cuts radiant exhaust heat by up to 80% to help control under-bonnet temperatures, support turbocharger longevity, and enhance reliability, while the improved flow adds a richer, more engaging exhaust tone.

Built for durability and fitment accuracy, every Redstar downpipe is 100% TIG welded and back purged, produced from 2.0 mm wall 304 stainless steel, and finished with OEM-spec flanges and mounting provisions. The result is a true bolt-on performance exhaust upgrade from Redstar that delivers real-world gains and a precision fit for Mercedes E53, E450, CLS53, CLS450, GT43, GT53, GT50, GLE53, GLS450, GLE450, and S-Class applications.

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.
• OPF: European Emission Cars only.

Key Performance Benefits

• Noticeable power and torque gains from reduced back pressure
• Faster turbo spool and sharper throttle response
• Lower under bonnet temperatures with optional shielding
• Enhanced, sportier exhaust tone
• Direct bolt-on installation for a straightforward upgrade
• Helps support turbocharger longevity

Technical Specifications

• Big-bore 3.5 in OD U-bend with smooth transition to 3 in OEM-spec outlet
• Designed using advanced 3D scanning and reverse engineering for precise fitment
• 2.0 mm wall 304 stainless steel construction
• 100% TIG welded and back purged
• OEM-spec flanges
• Brackets and mounts positioned as per the OEM unit

Notes

• EURO 6 compliant when equipped with HJS HD 200cpsi catalytic converters

Fitment

• 2018-2022 Mercedes E53/E450 W213/C238
• 2018-2023 Mercedes CLS450/CLS53 C257
• 2019+ Mercedes GT43/GT53/GT50 X290
• 2019-2022 Mercedes GLE53/GLS450/GLE450 W167 V167
• 2017-2020 Mercedes S450/S500 W222
• 2020-2022 Mercedes S400/S450/S450e/S480/S500/S580e W223