This Wagner Tuning BMW F-Series N55 Catless Downpipe Kit 7/13+ is suitable for the following vehicles. BMW M135i F20 / F21 model 07/2013 – BMW M235i F22 BMW M2 F87 BMW 335i(x) F30 / F31 / F34 model 07/2013 – BMW 435i(x) F32 / F33 model 07/2013 – Replacement for OEM BMW Part #18328602882 Designed in CAD and then constructed using 1.4301 (SS304) stainless steel. High flow decat* reduces the thermal load on the turbocharger. Significantly less back pressure resulting in increased torque and power. Perfect fit as a direct replacement for the OEM unit. 2 Lambda probe connections. Connection diameter 118mm *Off-road use only unless catalyst fitted in exhaust mid-section. Removal of all catalytic converters will almost invariably make your vehicle illegal for use on a public road. ECU will need to be coded to avoid engine management light errors.