CTS Turbo Race 3.5 Downpipe BMW N55 (Pneumatic Wastegate)

The CTS Turbo Catless Downpipe BMW N55 (Pneumatic Wastegate) 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:

• 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. Use of proper Bootmod3 software upgrade is strongly recommended. For OFF-ROAD use only. Application guide F30 BMW 335i & 335xi 2012 - 07/2013 F20/F21 BMW M135i & M135xi 2012 - 07/2013 135i or 335i with a production date after 07/2013 will need the 4" downpipe: 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 6 applications

335i

Make	Model	Engine	Years
BMW	335i		2012–2013
BMW	335i (F30)		2012–2013

335i xDrive

Make	Model	Engine	Years
BMW	335i xDrive		2012–2013
BMW	335i xDrive (F30)		2012–2013

M135i

Make	Model	Engine	Years
BMW	M135i		2012–2013
BMW	M135i (F22)		2012–2013

Fitment data last updated: 2026-06-26