It's the first-ever V-performance version of Cadillac's flagship four-door, but that's not the most interesting thing about the CT6 V-Sport Sedan. That would be the all-new 550 hp, 4.2L Twin Turbo V8 that powers it. Thanks to a "hot V" configuration that flips the normal layout of the cylinder heads' intakes and exhausts, the turbochargers are mounted at the top of the engine, practically eliminating turbo lag. All that power is sent to the unique 20-inch wheels via a 10-speed automatic transmission and is kept under control via a custom 19-inch brake system from Brembo. Expect to see more specs — and pricing info — ahead of its launch in early 2019.