DC – I don’t suggest a model – it is dependent upon the auto, and there are a lot of choices. See another responses. 1st, try and dislodge it by feeding a hose in the pipe and hitting the clog by using a high-pressure nozzle. If that doesn’t work, insert https://elliottyeim29518.hyperionwiki.com/670605/unlocking_performance_downpipe_upgrades_for_bmw_m_series_models