The ultimate American super sedan just got even more powerful. Hennessey’s H1000 performance upgrade transforms the 2025 Cadillac CT5-V Blackwing into a four-door monster, delivering up to 1,000 horsepower and 966 lb-ft of torque. Powered by a modified supercharged 6.2L V8, the H1000 package includes upgraded engine components, high-flow intake and exhaust, a recalibrated ECU, and dyno tuning—all backed by Hennessey’s limited warranty. Luxury meets lunacy. This is the world’s most powerful, street-legal Cadillac sedan—and it’s built to dominate.