Yeah, one of THOSE engines.
You'll hear Mad Mike Whiddett say it in this video any number of times, but Mazda factory support means access to all of the best stuff. That's how he's able to retire his RX-7 drift car and custom build the absolutely insane vehicle in this video. The car is based on a Miata, although much of it has been changed. Most importantly, the addition of an R26B engine, a four-rotor monstrosity borrowed from Mazda's Le Mans-winning 787B race car.
This isn't the actual engine, of course, just another R26B, capable of making up to 1,500 horsepower… in a Miata.