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C8 RS7 / RS6 / S8 / A8 Downpipes

New product

By replacing massive OEM 600cpsi catalytic converters with REDSTAR downpipes we unleash all the potential that the biturbo has. Combined with ECU tune our downpipes will hold any power you can get even with big-turbo upgrade.

***please specify if car has OPF or not***

More details


  • No Heat Shield
  • Includes Heat Shield
  • Catless
  • GESI 300cpsi
  • HJS 200cpsi
  • HJS 300cpsi
  • GESI 400cpsi

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More info

More and more customers prefer catted downpipes over the catless and there is many reasons for. In case of flow and performance, catted downpipes at least on 90% as effective as a straight pipes, while benefit with sound quality (not as raspy, deeper tone), no gas smelling, passing possible inspections with no error codes* or CEL.

Compatible Vehicles:

  • 2019+ Audi C8 RS7
  • 2019+ Audi C8 RS6
  • 2019+ Audi C8 S8
  • 2019+ Audi C8 A8 with 4.0 Twin Turbo engine

*Available Options:

  • HJS HD Ultra high-performance 200 cell made in Germany metal core catalytic converters. (Euro5).
  • GESI UHO 300 cell high-flow Metal Core Catalytic Converters. Rated 500-850hp each. EPA certified for use on OBD2 vehicles (1996 and newer) 49 States.
  • GEN 2 GESI 400 cell (No CEL)
  • Ultra high-performance 300 cell HJS HD (Euro 6), best in emissions and performance. Made in Germany, metal core catalytic converters. (No CEL)
  • OEM-style Heat Shielding with ceramic inner liner - the best way to reduce radiant heat up to 70%. Usual thermal wraps or coats not even close in effectiveness and durability to the Heat Shields. Must have option for the modern temp sensitive turbo engines.

Main Features:

  • Significant power gain
  • Faster spool up and better throttle response
  • Increasing the life of the turbos 
  • Reducing underhood temperature
  • Adds a very nice tone to the exhaust
  • 100% bolt-on installation
  • 100% TIG welded and back purged
  • Highest quality 2.0mm wall 304 stainless steel
  • OEM-spec flanges
  • All brackets and mounts as on OEM unit


*This product is not designed to meet any emissions/noise standards and is not for street or highway use. This product is not certified and may not be legal for use on emissions controlled vehicles in any country/jurisdiction.