Looks like Lexus is working on a hot version of the GS to rival the Audi RS6, Mercedes E 63 AMG and BMW M5.
The GS F prototype caught testing on the Nürburgring shows a rear diffuser, boot lid spoiler, new rear side skirt piece and a front lip spoiler.
The prototype is based clearly on the GS F Sport with extra spoilers, big air vent under the grille, F style quad exhaust pipes and new wheels with low-profile tyres.
Different reports suggest the new GS F uses a 465bhp 5.0-litre V8 engine. Recently Lexus showed a hot TMG 650 Sport concept with 641bhp form a twin-turbo 5.0-litre V8 – would be interesting if the GS F gets something similar!