Be forewarned. The next time you see a Cadillac CT5-V Blackwing on the road that seems a little bit meaner than standard, it might be one of these. Callaway Cars has just revealed the 780 horsepower SC780, an even more monstrous version of Cadillac's ultimate muscle-sedan. It may not stand out in the crowd, though, until it rips away from you at breakneck speed. There's No Replacement For Displacement Callaway Cars The CT5-V Blackwing SC780 uses a time-honored way of making more power: Adding displacement. It isn't a larger engine, though. The 6.2-liter LT4 V8 is factory fresh inside, still rocking everything Cadillac engineers gave it. The difference here is the supercharger, which is nearly double the size of the stock blower. Yikes. Callaway swapping the 1740cc factory supercharger with its own 3000cc GenFour unit.Callaway swaps the 1,740cc factory supercharger with its own 3,000cc GenFour unit. Adding 72% more displacement in the blower means it can flow much more air, and Callaway's TripleCooled intercooler makes sure the charge doesn't get too hot. And the result is a bundle of extra power.There's 112 hp over stock, to be exact, along with 14 more pound-feet of torque. Callaway's SC780 Blackwing makes 780 hp and 673 lb-ft of twist, connected to either a six-speed stick or a 10-speed automatic. But it's not so much the extra power as how that power is made. On that front, Callaway has a very interesting setup.There are plenty of other GM V8s with bigger superchargers around. Roots-type superchargers normally pull air in and down, sandwiching the charge cooler in the hot zone between the blower and the engine block. Callaway doesn't do that. Instead, the company's TripleCooled supercharger pulls the air in from the bottom, then sends it upward through the primary intercooler. That cooler sits on top, which means it lives in a much cooler place.After it goes through the primary, the flow of air is divided into one flow for each bank of cylinders, and each passes through its own secondary cooler. The result, Callaway says, is that the engine won't heat soak and lose power. Mild-Mannered Exterior Hides This Slab Of American Muscle Callaway Cars The SC780 gets more than just a blower, but it still stays largely close to stock. Callaway's own carbon engine cover and hood scoop are part of the package, with new side skirts and badges for some visual appeal.It also comes with the usual tuner-build serialized plaque, authenticity documents, and floor mats. The options list includes a Callaway exhaust, sports pedals, and a car cover. You can also take delivery at one of the company's factories – Connecticut or California – or take track delivery at Thompson Speedway Motorsports Park.The company can convert your existing CT5-V Blackwing to this spec. You can also have it shipped directly from GM's factory in Michigan to Callaway's facility to have the work done, and some authorized dealers have vehicles in inventory.Callaway has been building faster cars since the 1970s when founder Reeves Callaway started selling BMW turbo kits. Since then, the company has built IndyCar engines and run factory race teams, but it is best known for its Corvettes.The Sledgehammer Corvette is the most prominent of those cars. It was a 1988 model with two turbos strapped to its 5.7-liter V8 to make 898 hp and run to 255 miles per hour. At a time when the world's most outrageous supercars were making perhaps 400 to 450 hp, the Sledgehammer may as well have been a spaceship from another planet. CarBuzz Insight – Why This Matters: The Cadillac CT5-V Blackwing is one of the greatest performance sedans on sale today, but it's also on its way out with production of the CT5 done at the end of this model year. There will be a new one. Someday. But we have no idea as to what Cadillac has planned.That makes this car from Callaway one heck of a send-off to the Blackwing. It doesn't change the ride or handling, but it does give it a big injection of Vitamin HP. It might be the best version of the Blackwing, because it doesn't go for overly flashy, it just adds muscle. If that sounds good to you, grab your checkbook. And hurry.