Actually, slow might be the wrong word, because it's still fast. So that means that this Hennessey-tuned McLaren 12C is ludicrously fast.

Much like how the team at Hennessey modified the Ferrari 458 to have slightly more power but not be 1,000 horsepower of Italian overkill, the McLaren gets the same treatment with a 707 horsepower tune.

But those extra 91 horses make all the difference.

As you'd expect, the McLaren is a good bit faster than it once was. And that's all you need to know.