>>28510720
It's not fake at all, it's the same kind of system that was in my Miata. It's a pipe that goes up to the firewall to carry more of the engine note into the cabin.
>Improved intake and exhaust sound characteristics via an intake sound enhancer and optimized muffler chamber complement the bolder personality of the new GS.

https://pressroom.lexus.com/lexus-allnew-2013-gs350-august2012/