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BMW M1 Procar

The M1 Procar was a racing version of BMW's 1970s M1 supercar, powered by a 470-horsepower M88/1 inline-six that could rev to 9000 RPM and built for a one-make racing series. The series folded soon after it was founded, but thankfully the cars live on.

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The 10 Best-Sounding BMWs Ever Built

Inline fours. Inline sixes. V-8s. V-10s. V-12s. No matter what you're into, BMW has a great soundtrack for you.

From Road & Track