Redstar Audi B9 SQ5 Downpipe

Description

Unleash performance from your 2018+ Audi B9/B9.5 SQ5 3.0t Turbo with the Redstar performance exhaust downpipe. This direct bolt-on replacement for the factory downpipe features a large-diameter route with smooth, flow-optimised transitions that minimise back pressure and maximise exhaust velocity for stronger real-world gains on the 3.0t Turbo engine.

On the road you get faster turbo spool, crisper throttle response and a more engaging exhaust note. Optional high-flow catalytic converter packages, including GESI GEN2 400cpsi and HJS HD 200cpsi, further improve efficiency compared with stock units, while Redstar's motorsport-inspired OEM-style heat shielding option cuts radiant heat by up to 80% to help control under-bonnet temperatures.

Engineered for durability and precise fit, the assembly uses 2.0mm wall 304L stainless steel, is 100% TIG welded and back purged, and mates with OEM-spec V-band flanges and factory brackets. Developed with Redstar's focus on flow and thermal management, this downpipe delivers a compelling blend of performance, quality and reliability for your SQ5.

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 power and torque gains
• Faster turbo spool and more immediate throttle response
• Flow-optimised smooth-transition design for improved exhaust velocity
• Lower under-bonnet temperatures
• Enhanced, sportier exhaust tone
• True bolt-on upgrade using factory mounting points
• Supports longer turbocharger life

Technical Specifications

• Highest quality 2.0mm wall 304L stainless steel
• 100% TIG welded and back purged
• OEM-spec V-band flanges
• All brackets and mounts as on OEM unit

Fitment

• 2018+ Audi B9/B9.5 SQ5 3.0t Turbo