Regular price £363.77
AIRTEC Motorsport De-Cat Downpipe for BMW B58 Engine

By removing the original restrictive catalytic converter located within the factory OEM downpipe, back pressure is hugely reduced, which in return means faster response, increased power and a more aggressive exhaust note.

Supplied with an adaptor to marry up to the original exhaust system, it also fits aftermarket systems, making it the a perfect solution to replace the OEM downpipe.

One of the only manufacturers that offer a cast elbow to retain diameter!


  • Made from stainless steel

  • AIRTEC laser cut plaque

  • Smooth bends to ensure increased flow

  • Fits original and aftermarket exhaust systems

  • Improved performance further enhanced with remap

Will fit the following models:

  • F20/F21 – 140i

  • F22/F23 – 240i

  • F30/F31 – 340i

  • F32/F33/F36 – 440i

  • G30/G31/G38 – 540i

  • G32 GT 640i

  • G12 740i

  • G01 X3 M40i

  • G02 X4 M40i

The de-cat exhaust version is sold for motorsport and off road use only worldwide.

The sport catalyst version replaces factory emissions device and is not EC homologated. This may not meet current emission laws for road use in your territory.

Please contact us for more information

We aim to ship orders out as quickly as possible, depending on our stock availability.

However, please note that some items may have longer processing times.

If your order is urgent, we recommend contacting us to confirm availability and estimated shipping times before placing your order.

For any questions or concerns regarding shipping, please don't hesitate to contact us. We're here to help!

If you're unsure whether a product is compatible with your vehicle, we recommend checking with us before making a purchase.

Our team is here to assist you in finding the right fit for your vehicle's make and model.

Don't hesitate to reach out to us with any questions or concerns about compatibility – we're happy to help ensure you get the right product for your needs.

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