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BMW B58 Downpipe

New product

REDSTAR downpipe for The BMW B58 Engine. Optimized design, eliminate primary catalytic converter provides a huge increase in exhaust flow

More details


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

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More info


  • BMW M140i (F20/F21)

  • M240i M240ix (F22) B58 Engine

  • 2016+ BMW 340i 340ix (F30/31/34) L4-3.0L (turbo) B58 Engine

  • 2019+ BMW M340i M340ix (G20)  3.0L B58 Engine

  • 2016+ BMW 740i 740ix(G11) 3.0L (turbo) B58 Engine

  • 2016+ BMW 440i 440ix (F32) L4-3.0L (turbo) B58 Engine

  • BMW 540i 540ix (G30/G31) B58 Engine

Available Options:

  • GESI UHO high-flow Metal Core Catalytic Converter. Rated 500-850hp each. EPA certified for use on OBD2 vehicles (1996 and newer) 49 States.
  • HJS HD 200cpsi Ultra High-Performance catalytic converter. Made in Germany. No CEL issues, no ECU tuning required.
  • OEM-style Heat Shielding with ceramic inner liner - the best way to reduce radiant heat up to 70%. Usual thermal wraps not even close in effectiveness and durability to the Heat Shields.

Main Features:

  • Eliminate primary catalytic converter
  • Huge 108MM reduced to OEM spec
  • Significant power gain
  • Faster spool up and better throttle response
  • Increasing the life of the turbo
  • Reducing under hood 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 V-band flange
  • All brackets and mounts as on OEM unit


Catless only - Removing of factory catalytic converters will trigger a сheck engine light (can be eliminated with optionally O2 sensors restrictors). Firmware update recommended to get maximum performance gains. 

This product is not designed to meet any emissions 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.