BMW N55 Decat Downpipe - F30 F31 F32 EWG - Stainless Steel Performance Exhaust Upgrade
Transform the response, sound and performance of your BMW N55 with our UK-fabricated stainless steel decat downpipe. Designed for the later EWG electronic wastegate N55 engines from July 2013 onwards, this BMW 335i 435i M135i M235i decat downpipe delivers faster turbo spool, sharper throttle response and a more aggressive exhaust note. Built to last from premium T304 stainless steel and TIG welded, it is a proven, high-quality upgrade for BMW F-series N55 owners looking for genuine gains and a proper motorsport tone.
Key features
- T304 high-grade stainless steel construction, TIG welded in-house
- UK-fabricated with laser cut flanges, 10-12 mm thickness for strength and a perfect seal
- Mandrel-bent for optimal gas flow and maximum internal diameter
- Faster turbo spool for sharper throttle response
- Noticeable power gains and a deep, aggressive exhaust note
- Reduced exhaust backpressure and lower temperatures to help the turbocharger work more efficiently
- Substantial weight saving compared to the factory catalytic converter
Proven performance
We have tested this product and found increases of 10-15 bhp. Customers consistently report crisper response, stronger mid-range and a far more engaging sound. It is a fantastic upgrade for the N55 platform when you want performance, reliability and value.
Fitment - N55 EWG models from 07/2013+
- 1 Series F20: M135i, M135i xDrive - 235 kW + 240 kW N55
- 1 Series F21: M135i, M135i xDrive - 235 kW N55
- 2 Series F22: M235i Coupe - 240 kW N55
- 2 Series F23: M235i Cabriolet - 240 kW N55
- 2 Series F87: M2 - 272 kW N55
- 3 Series F30: 335i, 335i xDrive Sedan - 225 kW + 240 kW + 250 kW N55
- 3 Series F31: 335i, 335i xDrive Touring - 225 kW + 240 kW + 250 kW N55
- 3 Series GT F34: 335i, 335i xDrive Gran Turismo - 225 kW + 240 kW + 250 kW N55
- 4 Series F32: 435i, 435i xDrive Coupe - 225 kW + 250 kW N55
- 4 Series F33: 435i, 435i xDrive Cabriolet - 225 kW + 250 kW N55
- 4 Series F36: 435i, 435i xDrive Gran Coupe - 225 kW + 250 kW N55
Note: This decat downpipe fits N55 engines from July 2013 onwards. It will not fit pre-July 2013 M135i models. We supply a separate downpipe for those cars in our other items.
Fitting and support
Professional installation is recommended as exhaust fitment tolerances can vary. Feedback from customers is that it is straightforward to fit. To reduce the chance of an engine management light in most cases, we also recommend purchasing a Lambda Sensor Spacer which you will find in our other items.
Want it fitted by specialists? Choose Nforcd in Warwickshire. Request a fitting quote: Sales@nforcd.com.
Warranty
This product comes with a lifetime warranty.
Why choose this N55 decat downpipe
Built from premium materials, expertly welded and engineered for flow, this BMW N55 decat downpipe is designed to unlock the performance potential of your 335i, 435i, M135i and M235i. We have used and tested it ourselves, and our customers have been delighted with the quality, fit and results. If you are searching for a serious N55 exhaust upgrade with real gains, this is the downpipe to choose.
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