This index tracks competition-derived road cars and racing homologation specials, measuring motorsport connection and track-bred performance. It includes key models Ford GT40, Porsche 911 GT2/GT3, Ferrari F40, Lamborghini Diablo GTR, Mercedes-Benz CLK GTR, BMW M1, Jaguar XJR-15, Aston Martin DB4 GT, Shelby Daytona Coupe and Lancia Stratos HF.
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