As far as Cadillac sedans go, the CTS-V has proven to be a hit with the tuners. The Corvette-derived 6.2-liter supercharged V8 drivetrain puts out an impressive 556 horsepower, but the guys at D3 have turned theirs up to 750.

Matt Farah of Tuned wholeheartedly approves of D3's mods: "Added a (expletive deleted)-load of horsepower", is what he said. Meant to be a daily driver, the Cadillac CTS-V is an automatic, Farah notes while hitting the gas and going sideways. The Stage 4 tuning package comes with aftermarket air intakes, a bigger blower and gigantic 5.5-inch-thick intercooler to avoid heat soak. D3 says that its take on the CTS-V puts out 750 hp at the crank and sends 650 hp (along with 640 pound-feet of twist) to the wheels. That's a lot of muscle for a car capable of running groceries and dropping the kids off at school in record time.