His GT is covered in a black and green wrap that highlights one of his main NASCAR sponsors, Monster Energy. It's a pretty mean looking GT that blends rally and NASCAR styling.
View 2018 Ford GT Specs

As for his car of choice, it makes sense when you consider Ford is one of his sponsors. The GT itself is powered by an Ecoboost 3.5-liter 6 engine that produces 647 horsepower and 550 lb-ft of torque. That's a solid amount from a six-cylinder engine, and I'm sure Busch will use all of that power during the rally.