Looking for performance enhancements for your BMW N55 motor? Our downpipe without catalytic converter offers the ultimate solution for more power and an improved driving experience. Diameter of 76mm: An optimized diameter for maximum performance and efficiency. High quality cast stainless steel 1.4301 (SS304): Tough, durable and corrosion resistant for long-term performance. CAD-designed: Precisely shaped and developed for a perfect fit and optimum performance. 2 Lambda sensor connections: Provides compatibility and flexibility for different configurations. Without main catalytic converter: Reduces back pressure and improves vehicle performance. 100% perfect fit: Easy installation that makes replacing the stock part a breeze. Less thermal stress on the turbocharger: Protects the turbocharger from excessive heat and promotes longevity. More power through back pressure reduction: Optimizes the exhaust gas flow for increased performance. Significantly more torque: Experience noticeably improved torque for a more dynamic driving experience. Prepare your BMW N55 motor for a new level of performance and enjoy the ride with our high-quality downpipe without catalytic converter. Increase power, experience more torque. The Downpipe Kit is suitable for the following vehicles: BMW 135i E82/E88 BMW 335(x)i E90/E91/E92/E93 Part number 500001015 *ECU will need to be coded to avoid engine management light errors. Disclaimer for catalytic converters It should be noted 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 'burble' style tunes. 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.