BMW N55 Decat Downpipe EWG — M135i M235i 335i 435i Stainless Steel Performance Downpipe
Unlock serious performance and sound from your BMW N55 EWG engine with our UK-fabricated stainless steel decat downpipe. Designed for the post July 2013 electronic wastegate N55, this BMW M135i M235i 335i 435i catless downpipe delivers faster turbo spool, sharper throttle response and a more aggressive exhaust note. We have fitted and used this downpipe ourselves at Nforcd and customer feedback on fit, quality and gains has been excellent.
Why choose this BMW N55 decat downpipe
- Proven power increase — we have tested gains of 10 to 15 bhp
- Noticeably faster spool and sharper throttle response
- Deeper, more aggressive exhaust tone without drone
- Lower EGTs and reduced backpressure for improved turbo efficiency
- Substantial weight saving versus the factory catalytic converter
Premium construction for durability and flow
- T304 high grade stainless steel, corrosion resistant and heat resilient
- In-house TIG welded for strength and precision
- UK fabricated with laser cut 10 to 12 mm flanges for a precise seal
- Mandrel bent for maximum internal diameter and optimal gas flow
- Built for performance without sacrificing mid range torque
Fitment — N55 EWG models from 07/2013 onwards
This decat downpipe fits the following BMW models equipped with the N55 electronic wastegate engine built from July 2013 onwards:
- 1 Series F20 M135i, M135i xDrive — 235 kW and 240 kW
- 1 Series F21 M135i, M135i xDrive — 235 kW
- 2 Series F22 M235i Coupe — 240 kW
- 2 Series F23 M235i Cabriolet — 240 kW
- 2 Series F87 M2 — 272 kW N55
- 3 Series F30 335i, 335i xDrive Sedan — 225 kW, 240 kW, 250 kW
- 3 Series F31 335i, 335i xDrive Touring — 225 kW, 240 kW, 250 kW
- 3 Series GT F34 335i, 335i xDrive — 225 kW, 240 kW, 250 kW
- 4 Series F32 435i, 435i xDrive Coupe — 225 kW, 250 kW
- 4 Series F33 435i, 435i xDrive Cabriolet — 225 kW, 250 kW
- 4 Series F36 435i, 435i xDrive Gran Coupe — 225 kW, 250 kW
Note: this will not fit the 135i pre July 2013. We also supply the earlier N55 PWG downpipe, available in our other items.
Recommended extras
We recommend adding a lambda sensor spacer, also known as an O2 sensor spacer, to help prevent the engine light in most cases. You will find these in our other items.
Installation and support
Professional installation is recommended, as some exhaust systems can sit slightly differently and space is tight. Feedback from customers has been that this downpipe is straightforward to fit.
Want it fitted by the experts? Book fitting with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Built to last
This product comes with a lifetime warranty.
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For availability, fitment checks and workshop bookings, contact Sales@nforcd.com.