Are all the vents functional except the hood?

[STINGER]

I know it have been confirmed that the hood vents are not functional, but what about the rest?

There is a left & right intake vents in the front bumper, vents in the front fender and rear bumper and a large center vent in the rear bumper also.

 

[KiaFan]

I believe the front bumper vents are functional, the ones on the rear bumper is just for show.

 

[ATXStinger]

Yes the front vents and the ones behind the wheels are functional. The rear ones aren't.

http://www.kiastinger.org/forum/threads/59-2018-Kia-Stinger-What-You-Need-to-Know