Unleash your BMW G90 M5 or G99 M5 Touring with the Redstar Exhaust Complete System, purpose-built for the S68 M60i engine. This complete performance exhaust upgrade replaces both the primary and secondary catalytic converters for a direct bolt-on fit, opening the system for a genuine step-change in flow and response.

By removing the major bottlenecks, the Redstar system cuts backpressure and significantly improves exhaust velocity, translating to noticeable power and torque gains, quicker turbo spool and a sharper throttle response. Add the HJS HD 200cpsi ultra high-performance catalytic converters for high-output durability, and specify OEM-style heat shielding to reduce radiant heat by up to 80% - ideal for the hot-vee turbo layout.

Every assembly is built from 2.0mm wall 304 stainless steel, 100% TIG welded and back purged, and finished with OEM-spec flanges and factory-style brackets for seamless integration. Expect an assertive Redstar sound, easy installation, and a robust performance exhaust solution that aligns with what BMW M5 owners look for when searching for premium performance exhaust, downpipes and Redstar upgrades.

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.
• 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 improved exhaust flow after replacing both primary and secondary catalytic converters
• Faster turbo spool and crisper throttle response
• Reduced engine bay temperatures with optional heat shielding to help protect surrounding components
• Helps extend turbocharger longevity by lowering backpressure and improving thermal control
• Deeper, more engaging exhaust tone
• Simple, true bolt-on installation that integrates with factory mounting points

Technical Specifications

• Constructed from 2.0mm wall 304 stainless steel
• 100% TIG welded and back purged
• OEM-spec flanges
• All brackets and mounts as on OEM unit

Fitments

• 2025+ G90 M5
• 2025+ G99 M5 Touring