BMW bid farewell to the current M6 Coupe and Convertible as production of both models came to an end this week. The announcement also signals the death of the Bavarian firm's 507HP 5.0-liter V10 engine that powered the already discontinued fourth-generation M5, as the next iterations of the M6 and M5 models will make use of a new turbocharged V8 powerplant producing somewhere close to 600 ponies.
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