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Imo regarding X3/X4M Real question is what Audi/Benz model will it compete with. Look at tfsi SQ5 version. B58 in refreshed tweaked a bit release might be sufficient. Whether would it have S designation or not, thats totally different question thou. Or another question, which i do not know answer to, which BMW engine is nów developed as a base for future M perf cars... N55 - not. B58 - with TU maybe, maybe not. Maybe someone else have more details on engine development.
Last edited by rypik@BW; 03-01-2017 at 10:28 AM..
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