Cadillac has revealed that it will not share its new Blackwing engine with other brands from the General Motors family.

The unit, a 4.2-liter twin-turbo V8, was unveiled in the range-topping CT6-V and will also be available with the new CT6 Platinum variant. In top form it delivers 550 hp and 627 lb-ft (850 Nm), and in the future it could be used by a number of performance-focused Cadillac models.

Asked by Motor Trend whether other brands would get the Blackwing, Cadillac president Steve Carlisle firmly stated “Over my dead body.”

The press has yet to sample the new engine, which is mated to a 10-speed automatic transmission, but if its specs and Cadillac’s confidence in it are anything to go by, it should be rather special.

Before the engine was even released in the CT6-V, there was speculation that it could power a future variant of the Corvette. That no longer seems likely, at least if Carlisle has his way.

Yesterday, it was revealed that Chevrolet will build a second round of CT6-V models after the first batch of 275 sold out in just two hours. Carlisle told Motor Trend that Cadillac had yet to decide how many more units it will build and didn’t disclose when they will be available to buyers. One thing we do know is that these additional CT6-V models will cost $4,000 more than those secured during the first round of pre-orders.

Production of the Blackwing engine is handled by GM’s Performance Build Center in Bowling Green, Kentucky.

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