Transform the exhaust performance of your BMW M3 F80, M4 F82 and F83, and M2 F22/F87 Competition with Redstar performance exhaust downpipes engineered for the 3.0 S55 twin turbo engine. These downpipes replace the restrictive factory catalytic converters within the downpipe section to free up exhaust flow for your S55-powered M car.

Expect sharper throttle response, quicker turbo spool, and meaningful power gains from the reduced backpressure and flow-optimised transitions. Optionally, Redstar OEM-style heat shielding uses motorsport-inspired construction to cut radiant heat by up to 80 percent, helping lower under-bonnet temperatures and supporting turbo longevity while enriching the exhaust character with a more assertive note.

Built for demanding use, every Redstar downpipe is hand made from premium 2.0mm wall 304L stainless steel, 100 percent TIG welded and back purged, and fitted with OEM-spec 304L stainless steel flanges plus factory-style brackets and mounts. The result is a true 100 percent bolt-on fit that is LHD/RHD compliant and integrates seamlessly with the original system. Choose Redstar downpipes for uncompromising quality, durability, and a decisive step up in performance and 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

• Noticeable power and torque gains from removing restrictive stock catalytic converters
• Faster turbo spool and crisper throttle response due to reduced backpressure
• Lower under-bonnet temperatures when specified with Redstar OEM-style heat shielding
• More pronounced, motorsport-inspired exhaust tone
• Direct 100 percent bolt-on installation to factory mounting points

Technical Specifications

• Flow-optimised smooth transition design
• 2.0mm wall 304L stainless steel construction
• 100 percent TIG welded and back purged
• 100 percent hand made manufacturing
• OEM-spec 304L stainless steel flanges
• Brackets and mounts mirror OEM geometry
• LHD and RHD compliant design

Notes

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

Fitments

• 2014-2018 M3 F80 Sedan 3.0 S55 Twin Turbo
• 2014-2018 M4 F82 Coupe 3.0 S55 Twin Turbo
• 2014-2018 M4 F83 Convertible 3.0 S55 Twin Turbo
• 2018-2022 M2 F22/F87 Competition 3.0 S55 Twin Turbo