Transform your Audi C8/C8.5 S6 Sedan/Avant and C8/C8.5 S7 Sportback Sedan with the 2.9L Twin Turbo V6 using Redstar performance exhaust downpipes. Purpose-built with a big-bore layout and smooth, flow-optimised transitions, these downpipes minimise restriction to let the 2.9T breathe more efficiently. Designed as a true bolt-on upgrade that interfaces with OEM mounting points, they elevate your exhaust system with precision-engineered efficiency.

Expect sharper throttle response, quicker turbo spool and significant gains in delivered power, paired with a deeper, more assertive exhaust character. Configure your system with high-output catalytic options including HJS HD 200cpsi and GESI GEN2 400cpsi converters rated to support up to 1000hp, or select the competition catless variant for maximum flow. Add Redstar's OEM-style, motorsport-inspired heat shielding to cut radiant exhaust heat by up to 80% and help control under-bonnet temperatures.

Built for durability and performance, every Redstar downpipe is manufactured from 2.0mm wall 304L stainless steel, TIG welded and back purged, and finished with OEM-spec V-band flanges. With LHD and RHD compatibility, Redstar delivers the quality, reliability and unmistakable sound enthusiasts expect from a premium performance exhaust downpipe upgrade.

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

• Significant power gain
• Flow-optimised smooth transition design for efficient exhaust gas velocity
• Faster spool up and improved throttle response
• Helps extend turbocharger service life
• Reduced under bonnet temperatures
• Deeper, more assertive exhaust tone
• Simple 100 percent bolt-on installation

Technical Specifications

• Constructed from 2.0mm wall 304L stainless steel
• 100 percent TIG welded and back purged
• OEM-spec V-band flanges
• Brackets and mounts mirror the OEM unit

Notes

• LHD and RHD compliant

Fitments

• 2019+ Audi C8/C8.5 S6 Sedan/Avant 2.9L Twin Turbo V6
• 2019+ Audi C8/C8.5 S7 Sportback Sedan 2.9L Twin Turbo V6