The Downpipe Kit fits in to: BMW M135i(x) F20 / F21 model 07/2013 - BMW M235i(x) F22 BMW M2 F87 N55 (not suitable for Competition version) BMW 335i(x) F30 / F31 / F34 model 07/2013 - BMW 435i(x) F32 / F33 model 07/2013 - BMW X3 M35i F25 LCI model 2014 BMW X4 M35i F26 model 07/2014 BMW X4 M40i model 07/2014 Replacement for OEM BMW Part# 18328602882 made out of high quality stainless steel 1.4301 (SS304) 100% perfect fit, replace OEM less thermal load on the turbocharger more power by reducing back pressure significantly more torque high quality racing catalytic converter (300CPSI and Euro 6 coating) weight: 4,0kg connection diameter 105mm Error display in the DME possible. Catalytic Converter Disclaimer It is to be noted that Wagner Tuning catalytic converters are intended to be used on OEM vehicles to optimize performance. They are NOT intended to be used in conjunction with an ECU tune. Wagner Tuning assumes no responsibility for damages caused by modifications made to a vehicle such as, a tuned ECU and/or 'burble' style tunes. Wagner Tuning is also not responsible for damages caused by engine malfunctions creating rich/lean conditions that are detrimental to the catalyst. A warranty audit will be performed on any claim regarding a catalytic converter. In order for a warranty to be honored, Wagner Tuning will require the purchaser to provide proof that the engine was unaltered and tuned to the original manufacturer's specifications and maintained in proper operating condition. The end user assumes all responsibility regarding the legality of use of a non-OEM catalytic converter on their vehicle for the region in which it is used.