BMW M135i M235i 335i 435i N55 Downpipe with 200 Cell Hi-Flow Sports Cat and Heat Shield
Upgrade your BMW N55 turbo engine with this premium T304 stainless steel catted downpipe. Designed for the BMW M135i, M235i, 335i and 435i platforms, this 200 cell hi-flow sports cat downpipe unlocks sharper throttle response, faster turbo spool, noticeable power gains and a deeper, more aggressive exhaust note. It is the perfect BMW N55 performance exhaust upgrade for daily drivers and track cars alike.
Engineered for OEM-like fitment with genuine performance benefits, this BMW N55 200 cell sports cat downpipe is TIG welded in house, mandrel bent for maximum gas flow, and finished in brushed stainless steel with an integrated heat shield. We have used and tested this product ourselves, and customers consistently report impressive gains and excellent fitment.
Key features and benefits
- T304 high-grade stainless steel BMW N55 downpipe with 200 cell hi-flow sports catalytic converter
- TIG welded in house for strength, durability and precise fit
- Mandrel-bent tubing for smooth exhaust gas flow and mid-range torque retention
- Faster turbo spool for sharper throttle response and improved drivability
- Noticeable power gains and a richer, more aggressive N55 exhaust sound
- Reduced exhaust backpressure and lower temperatures to relieve the turbocharger
- Substantial weight saving versus the factory catalytic converter
- Brushed stainless finish with heat shield for performance and protection
- We have tested and seen increases of 10–15 bhp
Compatibility - BMW N55 catted downpipe fitment
This downpipe fits the following BMW N55 models from July 2013 onwards:
- 1 Series F20 M135i, M135i xDrive, 235 kW + 240 kW N55 engine, built from 07/2013
- 1 Series F21 M135i, M135i xDrive, 235 kW N55 engine, built from 07/2013
- 2 Series F22 M235i Coupe, 240 kW N55 engine, built from 07/2013
- 2 Series F23 M235i Cabriolet, 240 kW N55 engine, built from 07/2013
- 2 Series F87 M2, 272 kW N55 engine, built from 07/2013
- 3 Series F30 335i, 335i xDrive Sedan, 225 kW + 240 kW + 250 kW N55 engine, built from 07/2013
- 3 Series F31 335i, 335i xDrive Touring, 225 kW + 240 kW + 250 kW N55 engine, built from 07/2013
- 3 Series GT F34 335i, 335i xDrive Gran Turismo, 225 kW + 240 kW + 250 kW N55 engine, built from 07/2013
- 4 Series F32 435i, 435i xDrive Coupe, 225 kW + 250 kW N55 engine, built from 07/2013
- 4 Series F33 435i, 435i xDrive Cabriolet, 225 kW + 250 kW N55 engine, built from 07/2013
- 4 Series F36 435i, 435i xDrive Gran Coupe, 225 kW + 250 kW N55 engine, built from 07/2013
Fitment note: fits all BMW N55 engines from July 2013 onwards. It will not fit the 135i pre July 2013.
Why choose this BMW N55 200 cell sports cat downpipe
- Optimised for BMW M135i downpipe upgrade, BMW M235i downpipe, BMW 335i downpipe and BMW 435i downpipe applications
- Hi-flow catted downpipe improves performance while maintaining a road-friendly setup
- Ideal for enthusiasts seeking a BMW N55 performance exhaust upgrade with quality materials and superb welds
- Positive customer feedback on sound quality, throttle response and ease of installation
Installation and fitting
Professional installation is recommended, as exhaust tolerances vary and space can be tight. Feedback on this BMW N55 downpipe has been that it is very easy to fit. For expert fitting, choose Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Emissions, MOT and vehicle notes
- These should pass an MOT emissions test when fitted. They are road legal and Euro 5 rated.
- If your later model has OPF or PPF filters, these will need coding out. Please consult a reputable tuning company.
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