The Cadillac CT5-V Blackwing is a flagship sport sedan that produces more than 668 horsepower and 659 lb-ft of torque while also being the fastest car that this luxury brand makes. Enter Hennessey and this sedan has now been catapulted to rocket ship status. Hennessey has always been known for making fast cars faster and that is also what the H1000 CT5-V is all about. Hennessey calls it the ‘hero of luxury sport sedans’ with its power out being pushed to a hypercar-esque 1,000 horsepower and 966 lb-ft torque.
The supercharged 6.2-liter ‘LT4’ V8 is comprehensively rebuilt and fitted with a larger supercharger and upgraded calibration. In terms of its changes, the H1000 Cadillac CT5-V Blackwing has its LT4 receiving ported cylinder heads, enhanced intake, and exhaust valves, improved lifters and pushrods, oversized heat exchangers, and long-tube stainless steel headers. Then GM’s small block is fitted with a high-flow supercharger, replacing the factory unit. Lastly, Hennessey’s engineers upload Hennessey Engine Management Calibration (HEMC) for its new mission.
The enhanced power out reflects in the performance figures with a full second being shaved off the 0-60 mph sprint plus there is a drop in the ¼ mile run to 10.1 seconds, and the top speed is well above 200 mph. John Hennessey, company founder, and CEO: “Cadillac’s CT5-V Blackwing, fitted with GM’s supercharged LT4, was a natural candidate for our upgrade as it improves power considerably without affecting drivability. Resurrected as an ‘H1000’, the four-door Cadillac is the fastest combustion-only luxury sedan on the planet. It is a rare high-water mark in a segment that will vanish by the decade’s end.”
Hennessey’s prodigious power upgrade complements Cadillac’s performance enhancements, including adaptive Magnetic Ride Control, Brembo brakes, and configurable driving modes for every situation. An integrated data recorder logs performance both on- and off-track.
The ‘H1000’ upgrade comes with Hennessey’s 2-year / 24,000-mile limited warranty. The upgrade only applies to the Cadillac CT5-V Blackwing (not the standard Cadillac CT5-V, fitted with a V6). Production of the new Hennessey ‘H1000’ Cadillac CT5-V Blackwing will begin in August 2023.