Good video, and the truth is very secret, obviously there will always be prototypes where things like that automatic spoiler are tested, on the M6 that sometimes due to costs - business plan do not reach production, very interesting that those more crazy and special keep them , I want that M6 ....and that CSL, or that M5 CSL that has MORE THAN 650 HP !!
What else will be in that garage....
You're right, we filmed them in 2011. Before social media was even a thing.F87 M2 CSL.
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Top secret: The BMW M CSL prototypes
BMW M3 CSL V8, M5 CSL, M6 CSL: M automobiles that no-one has ever seen. We take an exclusive peek inside the secret BMW M garage and encounter prototypes which were developed for maximum performance, but never saw the light of day.www.bmw-m.com
edit:
Also for what it's worth the M6 CSL with active aero has been seen before... next to the E39 M5 Touring prototype here, when M opened up their "secret basement".
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I can't remember where I read about it, but the fact it wasn't a standard M6 was lost on most reporters, and I think I only saw one source at the time describe it accurately. I referenced it back here
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