Why Detroit's automakers are spending big to go racing among world's elite

Motown brass believe there's money to be made, and technical cred to be won, by going racing against the best and doing it right.
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Porsche 991.2 RSR GTE Exhaust Sound

The Porsche 991.2 RSR GTE with its mid-engine layout and unrestricted exhaust. Captured on track with raw sound, this video ...