Cobra Sport Front Downpipe for BMW F40 M135i xDrive M135ix — Sports Cat or De-Cat — Resonated or Non-Resonated — 3 inch 76.2 mm T304 Stainless
Transform the sound and driving experience of your BMW 1 Series F40 M135i xDrive with the Cobra Sport 3 inch 76.2 mm front downpipe. Available as a high flow sports catalyst or de-cat, and in resonated or non-resonated configurations, this Cobra Sport downpipe is engineered to unlock flow, sharpen throttle response and deliver a deeper, sportier exhaust note. Hand crafted in the UK from T304 stainless steel with TIG-welded construction and CNC SS304 flanges, it is the go-to BMW M135i F40 downpipe upgrade for owners who want performance, quality and longevity. Backed by the Cobra Lifetime Warranty for complete peace of mind.
This BMW M135i F40 front pipe is designed to integrate perfectly with Cobra Sport GPF-back and Cobra Sport cat-back systems. Choose the connection type that matches your existing Cobra system, pick your preferred sound level with resonated or non-resonated, and select either a high flow sports cat or full de-cat for maximum flow on motorsport vehicles. Nforcd run this setup on our own and customer cars and the feedback is superb on sound quality, fit and finish.
Key benefits and features
- 3 inch 76.2 mm mandrel-bent T304 stainless steel for improved flow and performance potential
- Hand crafted, TIG-welded construction with CNC SS304 stainless steel flanges
- Choice of High Flow Sports Cat or De-Cat front downpipe
- Resonated or Non-Resonated centre section options to tailor sound
- Designed to connect to Cobra GPF-back or Cobra Cat-Back exhaust systems
- Sportier, deeper exhaust tone with the option to go louder with Non-Resonated
- Cobra Lifetime Warranty (non-transferable)
Options explained
- Sports Cat vs De-Cat: The High Flow Sports Cat increases flow while retaining a catalyst. The De-Cat maximises flow for track and motorsport use only.
- Resonated vs Non-Resonated: Resonated includes a centre silencer for a refined, sporty tone. Non-Resonated removes the centre silencer for a louder, more aggressive sound.
- To Cobra GPF-Back vs To Cobra Cat-Back: Select the connection type that matches your current Cobra rear system for a seamless fit.
Part numbers
- BM141A — Sports Cat / Resonated / To Cobra GPF Back
- BM140A — Sports Cat / Resonated / To Cobra Cat Back
- BM141B — Sports Cat / Non-Resonated / To Cobra GPF Back
- BM140B — Sports Cat / Non-Resonated / To Cobra Cat Back
- BM141C — De-Cat / Resonated / To Cobra GPF Back
- BM140C — De-Cat / Resonated / To Cobra Cat Back
- BM141D — De-Cat / Non-Resonated / To Cobra GPF Back
- BM140D — De-Cat / Non-Resonated / To Cobra Cat Back
Compatibility
BMW 1 Series F40 M135i xDrive M135ix — 2019 onwards.
Fitment details
- Replaces the factory front section with 3 inch 76.2 mm T304 stainless steel pipework
- Fits from the turbo/downpipe area through to the centre section
- When fitted to a Cobra Performance Exhaust, the SLJ supplied is not required
Sound and performance
Expect a significant step up in sound character and a more engaging drive. The Non-Resonated options provide the loudest result, while Resonated systems deliver a subtle but purposeful tone ideal for fast road and track. The free-flowing design supports future tuning and pairs perfectly with Cobra Sport GPF-back or cat-back systems for a complete performance exhaust upgrade on the BMW M135i F40.
Fitting and support
Professional installation recommended. We offer full fitting at Nforcd in Warwickshire — request a quote at Sales@nforcd.com. Basic engine tuning may be required at time of fitment to cancel the EML light.
Important notes
- For motorsport and off-road use only where applicable. Check local regulations regarding catalyst and GPF/PPF modifications.
- Cobra Lifetime Warranty applies to the original purchaser only.
Why buy from Nforcd
We supply and fit Cobra Sport BMW M135i F40 exhausts day in, day out. Our customers love the build quality, the fitment accuracy and the way these systems transform the M135i xDrive. Order your Cobra Sport BMW M135i downpipe upgrade today for the best mix of performance, sound and reliability.
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