BMW N55 Decat Downpipe for M2 F87, M135i, M235i, 335i, 435i EWG
Unlock serious performance and sound from your BMW N55 with our stainless steel decat downpipe. Built for the post-July 2013 N55 EWG electronic wastegate engines, this catless downpipe transforms throttle response, turbo spool and exhaust note while reducing backpressure for real-world gains. Precision fabricated in the UK from premium T304 stainless and TIG welded in house, it is a proven upgrade for BMW M2, M135i, M235i, 335i and 435i owners who want more power, sharper response and an aggressive tone.
Why choose this N55 decat downpipe
- T304 high-grade stainless steel construction with in-house TIG welding for strength and durability
- UK-fabricated with 10 to 12 mm laser-cut flanges for a perfect, leak-free seal
- Mandrel-bent for maximum internal diameter and optimal gas flow without sacrificing mid-range torque
- Sharper throttle response thanks to faster turbo spool and reduced exhaust backpressure
- Noticeable power gains with a more aggressive, motorsport-inspired exhaust note
- Lower operating temperatures due to improved flow and relief on the turbocharger
- Significant weight saving compared to the factory catalytic converter
We have tested this product and found increases of 10 to 15 bhp, with customers praising the fitment, sound and performance uplift. We have used this setup ourselves and it delivers every time.
Fitment compatibility
Designed for BMW N55 EWG engines from July 2013 onward.
- 1 Series F20 M135i, M135i xDrive 235 kW and 240 kW N55, built from 07/2013
- 1 Series F21 M135i, M135i xDrive 235 kW N55, built from 07/2013
- 2 Series F22 M235i Coupe 240 kW N55, built from 07/2013
- 2 Series F23 M235i Cabriolet 240 kW N55, built from 07/2013
- 2 Series F87 M2 272 kW N55, built from 07/2013
- 3 Series F30 335i, 335i xDrive Sedan 225 kW, 240 kW, 250 kW N55, built from 07/2013
- 3 Series F31 335i, 335i xDrive Touring 225 kW, 240 kW, 250 kW N55, built from 07/2013
- 3 Series GT F34 335i, 335i xDrive Gran Turismo 225 kW, 240 kW, 250 kW N55, built from 07/2013
- 4 Series F32 435i, 435i xDrive Coupe 225 kW, 250 kW N55, built from 07/2013
- 4 Series F33 435i, 435i xDrive Cabriolet 225 kW, 250 kW N55, built from 07/2013
- 4 Series F36 435i, 435i xDrive Gran Coupe 225 kW, 250 kW N55, built from 07/2013
This downpipe fits all N55 engines from July 2013 and newer. It will not fit the 135i pre-July 2013. We supply a version for that model in our other items.
Installation and support
Professional installation is recommended. Tolerances between factory exhaust systems can vary, although feedback shows this is a very straightforward fit. For fitting, we recommend Nforcd in Warwickshire. Request a quote by emailing Sales@nforcd.com.
We also recommend purchasing a lambda sensor spacer to help prevent the engine light from illuminating in most cases. You can find these in our store.
Warranty
This product comes with a lifetime warranty.
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