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TCM B58 4.5" Race Downpipe BMW 240i/340i/440i/Supra/X3 F/G Chassis

TCM B58 4.5" Race Downpipe BMW 240i/340i/440i/Supra/X3 F/G Chassis

Regular price $339.00 CAD
Regular price $365.00 CAD Sale price $339.00 CAD
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TCM is proud to release the B58 Catless Downpipe for your BMW or Supra

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A TCM Catless B58 Downpipe is an essential upgrade for any enthusiast looking to maximize the performance of their B58 engine.

Our downpipe is made from high-quality 304 stainless steal. It is designed to provide maximum exhaust flow and improve turbo spool time, resulting in increased horsepower and torque. By removing the factory catalytic converter and keeping a large internal diameter with a smooth transition down to the midpipe size, we're able to maximize exhaust flow and reduce air turbulence. Giving you more power.

Not only does this provide an increase in power, it also provides you with a nice increase in exhaust tone. Making your car sound more aggressive.

The catless design eliminates the restrictive catalytic converter, allowing for maximum exhaust flow and reducing backpressure. This results in a noticeable increase in power and throttle response, as well as a more aggressive exhaust note.

The TCM Downpipe is a direct bolt-on replacement for the factory downpipe, no need to make any cuts or alterations.

The downpipe is also designed to work seamlessly with the factory exhaust system, as well as aftermarket systems.


  • Compatible with right-hand drive and left-hand drive vehicles
  • Smooth bends for maximum airflow without any drone
  • 304 stainless steel, which provides excellent durability and resistance to corrosion.
  • Up to 30HP increase on the stock turbos, even more on upgraded turbos
  • Lifetime warranty on defects and fitment
  • 90 day return period
  • All orders ship in 1-2 business days
  • Fitment Guaranteed 
  • Flex section



  • 2015+ BMW M240i & Xdrive
  • 2016-2019 BMW 340i & Xdrive
  • 2020+ BMW M340i & Xdrive
  • 2016+ BMW 440i & Xdrive
  • 2016+ BMW 540i & Xdrive
  • 2016+ BMW 740i & Xdrive
  • 2017-2020 X3 M40
  • 2017-2020 X4 M40
  • 2019+ Toyota Supra 3.0L
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