Upgrade your BMW M135i N55 with the Cobra Sport 3 inch 76.2 mm turbo downpipe, available as a high flow 200 cell sports cat or a de-cat catless downpipe. Precision made in the UK from TIG welded 304 stainless steel with CNC SS304 flanges, this F20 M135i downpipe transforms exhaust flow, response and sound while delivering the quality and reliability enthusiasts expect from Cobra Sport. Perfect for anyone searching for BMW M135i downpipe, BMW N55 downpipe, F20 M135i sports cat, M135i decat downpipe or turbo down pipe upgrade in the UK.
Why choose the Cobra Sport downpipe for BMW M135i N55 F20
- 3 inch 76.2 mm mandrel bent pipework from the turbo to the centre section replaces the restrictive factory catalyst
- Option of 200 cpsi high flow sports catalyst or de-cat catless version for maximum performance
- Hand crafted, TIG welded 304 grade stainless steel with CNC machined stainless flanges for a perfect seal
- All relevant fittings and gaskets supplied for a straightforward install
- Cobra Sport Lifetime Warranty for long term peace of mind
Real performance gains
With the Cobra Sport de-cat fitted, independent testing revealed an increase of 20 bhp at the wheels and 28 lb ft of torque before any remap. With tuning, typical gains of 20 to 25 hp are achievable. The result is faster turbo spool, sharper throttle response and a deeper, sportier exhaust note.
Sports Cat vs De-Cat
- 200 cell Sports Cat High flow catalyst designed to reduce backpressure while maintaining emissions control. Suitable for road use and will pass UK MOT emissions tests and roadside checks.
- De-Cat Maximum flow for track, motorsport and off road use only. This option will not pass a UK MOT emissions test or police roadside checks.
Compatibility and fitment
Designed for the BMW M135i F20 with the N55 engine. Fits from the turbo to the centre exhaust section and replaces the standard catalyst. Available for both pre June 2013 and post June 2013 cars. If you are unsure of your build date, contact us and we will help you select the correct part.
Installation and support
Installation is straightforward with all relevant fittings and gaskets supplied. We highly recommend replacing the downpipe to turbo gasket when installing the catless downpipe.
Prefer professional fitting. Nforcd offers expert installation in Warwickshire. Request a quote via Sales@nforcd.com.
We have supplied and fitted these Cobra Sport M135i N55 downpipes for customers and the feedback on quality, fit and sound has been excellent.
Part numbers
- BM77 Sports Cat for pre June 2013 models
- BM72 Sports Cat for post June 2013 models
- BM78 De-Cat for pre June 2013 models
- BM73 De-Cat for post June 2013 models
Brand and warranty
Manufactured in the UK by Cobra Sport from certified 304 stainless steel and TIG welded for a superior finish. Backed by the Cobra Sport Lifetime Warranty.
Dyno graph
Important notes
- De-cat downpipe is sold for motorsport and off road use only
- Sports cat version will pass UK MOT emissions tests and roadside checks
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