If there's one feature that has remained consistent on Lexus' F-branded high-performance models (not to be confused with the F-Sport trim variants ), are the signature stacked tailpipes on both sides of the rear bumper.
Add to that a group of Lexus employees who were enraged with our spy photographers for catching a few shots of a completely undisguised Lexus GS with the aforementioned feature, and you will understand why we believe that the car parked in one of the brand's garages is a prototype for the GS F.
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