From the factory, the 2009 Cadillac CTS-V produces 556 horsepower. And that seems like a lot. After all, it’s more than a brand-new Porsche 911, the Aston Martin DB9, and only slightly less than a Ferrari 458. But 556 hp was nowhere near enough for the group of talented lunatics that is SNL Performance. Their tuned version produces a simply staggering 1309 hp.