2015 BMW M3 and M4: Specs and Engine Noise - XCAR

To see our latest film before it's on YouTube: Subscribe for more XCAR videos: This is the closest look you'll get at the all-new BMW M3 and M4. They're both very quick, very good looking and loaded with tech. We also got the opportunity to start them up and rev the new engine... Join the XCAR community... Like on Facebook: Fol

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