Unleash the potential of your BMW with Redstar performance exhaust downpipes engineered specifically for the 2017-2023 BMW M5 F90 and 2018-2023 BMW M5 Competition F90 4.4 L S63 twin-turbocharged V8, as well as the 2019-2023 BMW M8 F91, F92, and F93. This complete kit replaces the restrictive factory sections directly after the turbos and includes Upper Primary and Secondary Downpipes, utilising the OEM split slip-on design for precise alignment and a true bolt-on installation.
Flow-optimised geometry reduces backpressure for faster spool and sharper throttle response, translating to significant real-world gains and a more engaging driving experience. Optional OEM-style heat shielding with a ceramic inner liner cuts radiant heat by up to 80%, helping to control under-bonnet temperatures while enhancing turbo longevity and adding a richer, more characterful exhaust tone.
Built for durability and performance, every Redstar system is crafted from 2.0 mm wall 304 stainless steel, 100% TIG welded and back purged, and finished with OEM-spec V-band flanges and factory-style brackets. Available with HJS 200cpsi or GESI GEN2 400cpsi catalytic converter options and Redstar’s motorsport-inspired heat shielding, this downpipe set blends precision fitment with proven engineering for the BMW M5 and M8 platforms.
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 increases in power and torque delivery
- Quicker turbo spool and sharper throttle response
- Lower strain on turbochargers for improved longevity
- Reduced under-bonnet temperatures
- Deeper, more engaging exhaust tone
- True bolt-on fitment to factory mounting points
Technical Specifications
- 2.0 mm wall 304 stainless steel construction
- 100% TIG welded and back purged
- OEM-spec V-band flanges
- Factory-style brackets and mounts
- Utilises the OEM split slip-on design
- Includes Upper Primary and Secondary Downpipes
