Welcome to the world of performance optimization for your BMW M135i. Our downpipe without catalytic converter has been developed to revolutionize your driving experience and take your vehicle's performance to a new level. Optimal diameter of 76mm: For an improved exhaust gas flow and optimized power delivery. High-quality stainless steel 1.4301 (SS304): The use of stainless steel ensures durability, corrosion resistance and first-class quality. CAD-designed: Every detail has been carefully designed to ensure a perfect fit and optimum performance. Two lambda probe connections: For maximum flexibility and compatibility with different configurations. Without main catalytic converter: Reduces back pressure and improves the performance of your vehicle on the road or race track. 100% perfect fit: The Y-pipe is designed so that it can be seamlessly replaced with the standard part without having to make any additional adjustments. Less thermal stress on the turbocharger: Protects the turbocharger from excessive heat and contributes to the longevity of the engine. More power through back pressure reduction: Optimizes the exhaust gas flow and increases the performance of your BMW M135i for an impressive driving experience. Connection diameter of 105mm: For a smooth and precise installation. Noticeably more torque: Experience increased power and impressive torque that gives your vehicle a new dynamic. Ready to push the limits of your BMW M135i? Our downpipe without catalytic converter is the perfect choice for anyone who wants to get the most out of their vehicle. The Downpipe Kit is suitable for the following vehicles: BMW M135i(x) F20 / F21 up to year of manufacture: 06/2013 BMW 335i(x) F30 / F31 / F34 up to year of manufacture: 06/2013 BMW 435i(x) F32 / F33 up to year of manufacture: 06/2013 *Replaces original BMW part number: 18328603875 part number: 500001014 The software data status should be adapted to avoid the output of error codes in the DME. Disclaimer for catalytic converters Please note that Wagner Tuning catalytic converters are intended for use on OEM vehicles for performance optimization. They are NOT intended for use in conjunction with ECU tuning. Wagner Tuning GmbH & Co. Kg. accepts no responsibility for damage caused by modifications to a vehicle, such as a tuned ECU and/or deactivation of the boost cut-off. Wagner Tuning GmbH & Co. Kg. is also not responsible for damage caused by engine malfunctions that create rich/lean conditions that are detrimental to the catalytic converter. All claims regarding a catalytic converter are subject to a warranty check. In order for a warranty to be honored, Wagner Tuning GmbH & Co. Kg. requires the purchaser to prove that the engine has been set up unchanged and in accordance with the original manufacturer's specifications and has been kept in proper working order. The end user assumes all responsibility for the legality of the use of a non-OEM catalytic converter on their vehicle for the region in which it is used.