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MTC Motorsport BMW M140i M240i 340i 440i 540i and 740i 4.5” stainless steel decat downpipe for B58 engine only

  • The M140i downpipe is machined from SS304 aircraft-grade stainless steel and are tig welded in house
  • The B58 downpipe is made of 4.5" stainless pipe straight out of the turbo providing a sharper throttle response due to faster spool of the turbo
  • This downpipe will provide noticeable power gains and a much more aggressive exhaust note which sounds truly amazing
  • It produces lower temperatures and less exhaust backpressure due to the relief of the turbocharger. Also, the cylinder charge is increased
  • There is also a substantial weight saving in comparison to the factory catalytic converter.
  • The decat is mandrel-bent for better gas flow and maximum internal size to ensure ultimate performance without the loss of mid-range torque.  

This downpipe will fit the following models with a B58 engine:

  • BMW M140i 2016+ F20 and F21 and xDrive
  • BMW M240i 2016+ F22 and xDrive
  • BMW 340i 2016+ F30 F31 and xDrive
  • BMW 440i 2016+ F32 F33 F36 and xDrive
  • BMW 540i 2016+ G30 and xDrive
  • BMW 740i 2016+ G11 G12 and xDrive

This will NOT fit the 2018 onwards models with the PPF filter unless it has been coded out and can be removed.

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