CTS Turbo 4.5″ High-Flow Cat for BMW B58 1/2/3/4/5/7 Series RWD & XDrive (2016-2024)

The CTS Turbo High-Flow Cat for the BMW B58 is made to maximize exhaust flow for the 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
• High-flow 200cell catalytic converter
• Precisely designed and tested on a real car in the real world
• T304 stainless steel, TIG welded back-purged construction
• 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).

Catalytic converters damaged by “crackle tune” are not covered under warranty.

• 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- 2024 G30/G31 BMW 540i & 540i xDrive
• 2016- 2024 G11/G12 BMW 740i & 740i xDrive
• 2018- 2024 G01 BMW X3 M40i xDrive
• 2018- 2024 G01 BMW X4 M40i xDrive
• 2019- 2024 G01 BMW X5 40i xDrive

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

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.