Talk of a BMW M5-rivalling version of the Lexus GS refuses to die, and this week UK mag Autocar has added yet another rumour to the already substantial pile.
According to anonymous sources, Lexus is in the final stages of developing a high-performance GS F model, which will use an uprated version of the RC F's 5.0 litre V8 and push out around 373kW of power.
That's a 22kW increase over the RC F's already substantial 351kW output, and it will be achieved without turbochargers or a hybrid assist system.
Much of the RC F's mechanical underpinnings will also be transplanted, with the same 8-speed automatic and double-wishbone/multi-link suspension expected to be used in the GS F. A torsen differential will help contain wheelspin.
Recent photos of a GS prototype circling the Nurburgring Nordschliefe (pictured) indicate that Lexus is serious about giving the GS F some serious performance credentials, and the appearance of the car also gives us a few clues about what to expect.
While the bodywork is similar to a GS 350 F Sport, the lower bumper extensions, sideskirts, bootlid spoiler, performance wheel and tyre package, beefier brake system and quad exhaust pipes all indicate that something special lurks under the bonnet.
If Autocar's source is right, a motor show debut in the second half of 2015 would likely be our first glimpse of the GS F, with the car going on sale either in the fourth quarter or early in 2016.
Autocar also reports that Lexus will unveil an all-new model at the Los Anglese motor show in November, though it's not known whether it will be the expected production version of the LF-LC sportscar concept, or the long-awaited replacement for the LS large sedan.
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