2021 BMW M4 GTS spied with curious quad exhaust

A vehicle thought to be a 2021 BMW M4 GTS has been spied driving on a motorway in Germany, revealing some unique design features. The photos, originally posted on Instagram by @diddyf30, show a fixed rear spoiler which suggests the car may be a GTS version of the upcoming 2021 BMW M4, as seen on the previous limited-edition BMW M4 GTS.