What happens if you take a V8 American muscle and give it more muscle? Meet the Hennessey Twin Turbo V1000 CTS-V Coupe. As the name suggests, it is based on the Cadillac CTS-V Coupe. The standard CTS-V Coupe packs GM’s ferocious 6.2-liter supercharged LSA V8 motor, producing 556 horsepower and …
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