Word was that the Cayman GT4 would be powered by a turbocharged engine, but just recently we reported that it would, in fact, have a naturally aspirated flat-six. Now we have clear-cut proof, as the GT4 was just caught testing at Monza without a hint of turbo spool, turbo whistle, or wastegate blow off. And, despite some minor driver errors, it seems like it was handling pretty damn well on the track too. And, that exhaust note? Amazing. Expect to see the Cayman GT4 debut sometime in mid-2019, if not sooner.