Decatalyst downpipe BMW N55 M135i M235i 335i 435i (F20/F21/F22/F23/F30/F31/F32/F33/F34) - TA Technix

100 mm plug-and-play stainless steel downpipe – N55 engine (BMW F20–F34)

This N55 TA Technix Decata downpipe is made of 100 mm stainless steel, with a turbo outlet and exhaust optimized for the N55 engine code, without a catalyst. It significantly improves the exhaust flow, accelerates the turbo spool, and releases a more aggressive sound. Compatible with BMW M135i / M235i / 335i / 435i .

• High quality stainless steel, TIG welding, 118 mm diameter on the turbo side

• Location for Lambda probe or sensor – meets engine requirements

• Optimized exhaust flow: more responsive turbo, better response.

• Sporty & bass sound – track use recommended (not road approved)

• Plug-and-play, reversible installation – requires ECU reprogramming after installation

• Important: Removing the catalytic converter often triggers an engine light. Consider reprogramming your ECU to disable lambda/cat errors.

It fits perfectly on BMW 1st series F20/F21, 2nd series F22/F23, 3rd series F30/F31/F34 and 4th series F32/F33/F36 equipped with the N55 engine. Easy to install, the TA Technix Downpipe without catalyst for BMW N55 135i 235i 335i 435i does not require any major modifications and extends the life of your turbo. Discover other exhaust solutions on CustomPlus and browse the Downpipe & Decatalyst collection .

Advantages of the TA Technix Stainless Steel Catalytic Converter Downpipe for BMW 135i 235i 335i 435i N55:

• Immediate performance gain : by removing the restrictive catalyst, the downpipe for BMW N55 allows a significant increase in torque and power.

• Sporty Sound : The TA Technix decat downpipe design for BMW N55 provides a throatier and more aggressive tone at low and mid rpm.

• Increased responsiveness : The TA Technix decat downpipe for BMW N55 reduces backpressure, accelerating turbo boost for instant response.

• Robust Design : Made of 304 stainless steel, the TA Technix catalytic converter-less downpipe for BMW N55 is resistant to corrosion and extreme temperatures, ensuring maximum durability.

• Plug & play installation : the TA Technix downpipe without catalyst for BMW N55 is fitted directly as a replacement for the original part, without modification of the supports or fixing points.

• Long-term savings : by removing the original catalyst, the TA Technix catalyst-free downpipe for BMW N55 avoids frequent replacement due to fouling, while improving turbo longevity.

• Versatile use : Whether for everyday use or track sessions, the TA Technix catalyst-free downpipe for BMW N55 ensures stable and reliable performance.

• BMW 1 Series F20/F21 – M135i (2013‑2016)
• BMW 2 Series F22/F23 – M235i/M2 (2014‑2018)
• BMW 3 Series F30/F31/F34 – 335i/335iX (2011‑2016)
• BMW 4 Series F32/F33/F36 – 435i/435iX (2013‑2016)