You thought the Cadillac CTS-V was bad-***? You're right, but the CTS-V Black Diamond is bad-asser. Or, as Cadillac puts it, it's a "finely crafted, tailored tuxedo." We like our description better. No, you don't get any performance enhancements in the Black Diamond, but then, you don't really need any. The 556-horsepower supercharged LSA V-8...

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