CTS Turbo B58 4.5" Catless Downpipe For 2016 –2022 BMW M240i/340i/440i/540i/740i/840i & XDRIVE

The CTS Turbo Catless Downpipe BMW B58 is made to maximize exhaust flow for highest power gains. Do not compromise performance and sound with factory parts – unleash your BMW’s potential!

Designed using the latest in CAD technology; this part is made to fit perfectly in place of your factory downpipe. Manufactured from T304 stainless steel, hand TIG welded and back purged to ensure years of reliable performance.

Product Details:

• 4.5″ downpipe, reducing down to 3.15″ or 80mm for perfect fitment to a factory or aftermarket exhaust
• Precisely designed and tested on a real car in the real world
• T304 stainless steel, TIG welded back-purged construction
• Replaces restrictive factory downpipe
• Great power upgrade with uncompromising performance
• Incredible sporty exhaust sound, subtle when cruising
• No drone with factory exhaust

We recommend replacing the downpipe gasket when installing, factory BMW gasket 18328612538 is required (not included).

• 2016+ F20 BMW M140i
• 2016+ F22 BMW M240i & M240i xDrive
• 2016+ F30/F31/G20 BMW 340i & 340i xDrive
• 2016+ F32/F33/F36/G22/G23/G26 BMW 440i & 440i xDrive
• 2016+ G30/G31 BMW 540i & 540i xDrive
• 2016+ G11/G12 BMW 740i & 740i xDrive
• 2018+ G01 BMW X3 M40i xDrive
• 2018+ G01 BMW X4 M40i xDrive
• 2019+ G01 BMW X5 40i xDrive

Stage 2 software is required to avoid check engine light. Only fits cars without GPF/OPF.

Vehicle Fitment

This 4.5” Catless Downpipe is designed to fit BMW and Toyota B58-powered models, including:

Generation 1 (Gen 1) B58 Models (2016-2019):

• 2016-2019 BMW 340i (F30/F31/F32)
• 2017-2019 BMW 240i (F22/F23)
• 2017-2019 BMW 440i (F32/F33/F36)
• Other BMW models equipped with the Gen 1 B58 engine

Generation 2 (Gen 2) B58 Models (2020+):

• 2020-2024 Toyota GR Supra (A90/A91)
• 2020-2024 BMW M340i (G20/G21)
• 2022-2024 BMW M240i (G42)
• Other BMW models with the Gen 2 B58 engine