BMW builds a more powerful inline-six called the S58, which debuted under the hood of the X3 M an X4 M producing 473 hp or 503 hp in Competition guise. This twin-turbocharged inline-six will also be employed for use in the next-generation M3 and M4 and possibly the rumored M2 CS. But what if it also found its way into the Supra?
“We’ve certainly made no offer to supply the engine to Toyota – and no request has been made, as far as I know. But it’s an interesting idea, if unlikely for now. It would be a lot for us to give away, you might say. But I’d never say never,” Flasch said. If Toyota did buy the S58 for use in the Supra, it would be the first time an outside manufacturer was granted access to an M engine since the McLaren F1’s S70 V12.