Track rats considering adding the Cadillac CT5-V Blackwing to their fleets may want to hold off buying the sedan until early 2025. That’s when Cadillac says it will begin offering a new Precision Package developed for this unicorn of a car, a V8-powered rear-wheel-drive sedan making 668 horsepower and 659 pound-feet of torque that’s sold as standard with a six-speed manual transmission.