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In 1991, Mazda did something no one else dared: they entered a rotary engine car, the 787B, into the 24 Hours of Le Mans, a race dominated by V8s, V10s, and turbocharged monsters. Experts laughed. Rotary engines were unreliable, overheated easily, and weren't meant for endurance. But Mazda engineers spent years perfecting a screaming four rotor engine that revved to 9,000 RPM and weighed less than most V6s. The result? Against all odds, the 787B not only finished the race, it won, beating Porsch

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