CTS Turbo 4 High-flow CAT BMW N55 (Electric Wastegate)

The CTS Turbo High-flow Cat for BMW N55 (Electric Wastegate) 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:

• 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

To remove the CEL that will occur, proper tuning software must be used. The use of Bootmod3 downpipe software upgrade is strongly recommended. For OFF-ROAD use only. Catalytic converters damaged by "crackle tune" are not covered under warranty. Application guide (does not fit RHD vehicles) F30 BMW 335i & 335xi Production date after 07/2013 F20/F21 BMW M135i & M135xi Production date after 07/2013 F32/F33/F36 BMW 435i & 435xi 2013+ F22 BMW M235i & M235xi 2013+ F87 BMW M2 2015+ Stage 2 software is required to avoid check engine light.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 8 applications

M235i xDrive

Make	Model	Engine	Years
BMW	M235i xDrive (F22)		2014–2016

M135i

Make	Model	Engine	Years
BMW	M135i (F22)		2014–2016

M235i

Make	Model	Engine	Years
BMW	M235i (F22)		2014–2016

335i xDrive

Make	Model	Engine	Years
BMW	335i xDrive (F30)		2013–2015

335i

Make	Model	Engine	Years
BMW	335i (F30)		2013–2015

435i xDrive

Make	Model	Engine	Years
BMW	435i xDrive (F32)		2013–2016

435i

Make	Model	Engine	Years
BMW	435i (F32)		2013–2016

M2

Make	Model	Engine	Years
BMW	M2 (F87)		2015–2018

Fitment data last updated: 2026-09-25

✓ Fits 8 vehicle applications Check vehicle fitment before ordering View fitment