2016 BMW X4 M40i CRAZY LOUD! Exhaust Sound Startup & Revs Sound of the BMW X4 M40i which has the nearly the same engine as the BMW M2. The exhaust sound is louder than that of a M235i. AutoTopNL Facebook Fanpage: http://on.fb.me/1jlG5pQ for live updates on recordings and more! UK: Auto-Top is an honest and pure car filming and testing company. We're not interested in eco & green. Screaming exhaust
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