Lexus engineers are working on a GS F model that would pair the GS model with the LFAs 4.8L V10 engine. It seems unlikely to be true, especially the idea that Lexus will be working on improvement of the oldest sedan in the lineup. While the LFAs V10 is lighter and smaller than the IS Fs 5.0L V8, its also more expensive.
Currently the midsize sedan comes in three different trim levels: the V6 powered GS 350, the V8 powered GS 460 and the hybrid GS 450. A new super-high-performance version equipped with V10 will be joining this trio.
This makes sense for Toyota to install such a costly engine on this vehicle. V10 powered GS F will give the company an instant Audi RS, Mercedes-Benz E63 AMG challenger. The powerplant derived from Toyota's Formula 1 race engine, it is reputed to produce around 500hp. The expected price of GS F V10 will reach the tag about $70.000 - $80.000.