Unleash performance in your BMW X5 M50i G05, X6 M50i G06, X7 M50i G07 and XB7 Alpina with Redstar Exhaust downpipes engineered specifically for the 4.4L N63 M50i. Designed to replace the factory downpipes, this performance exhaust upgrade enhances flow while retaining full compatibility with OEM mounting points.
Experience sharper throttle response, faster turbo spool and a more assertive exhaust note as back pressure is reduced. Tailor the system with high-performance catalyst options including HJS HD 200cpsi and GESI GEN2 400cpsi, both developed for high-output applications and rated to support up to or over 1000hp. Add Redstar's OEM-style heat shielding to cut radiant heat by up to 80% for improved thermal control in the engine bay.
Constructed from 2.0mm wall 304 stainless steel, each assembly is TIG welded and back purged with OEM-spec flanges for a precise seal. The result is a true bolt-on downpipe solution that integrates cleanly with factory brackets and mounts. Crafted for durability, reliability and sound quality, Redstar delivers a refined, high-quality performance exhaust upgrade for BMW G05, G06 and G07 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.
- 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 gains in power and torque
- Quicker turbo spool and sharper throttle response
- Helps lower under-bonnet temperatures
- Supports longer turbocharger service life
- Deeper, more engaging exhaust tone
- Direct bolt-on fit using factory mounting points
Technical Specifications
- 2.0mm wall 304 stainless steel construction
- TIG welded and back purged throughout
- OEM-spec flanges for reliable sealing
- Brackets and mounts mirror the OEM layout
