2021 Porsche 718 Cayman GT4 RS spied

Porsche is readying an even hotter 718 Cayman to sit above the GT4, with what appears to be a GT4 RS snapped during testing. The GT4 was launched in July this year, and has already won plaudits for its balanced handling, raucous engine and manual gearshift. But for some that won't be enough. That's where the RS comes in.