Rumors about a Lexus LS F have been floating around for awhile and Toyota Motorsport GmbH even showed off a 641 hp concept several years ago.

Apparently taken from a Japanese magazine, the image shows the high-performance sedan would have an aggressive front fascia with a massive spindle grille that is flanked by large air intakes.

Moving further back, the car has front fender vents and revised side skirts. There also appears to be muscular rear fenders, a reduced ride height, and large alloy wheels. While it would be easy to dismiss the model as a magazine rendering, the publication notes the RC F was given an early reveal in a similar fashion. The timing is also interesting as reports have suggested Lexus could unveil an LS F or LS F concept at either the Tokyo Motor Show or the North American International Auto Show.

If Lexus is indeed working on an LS F, it could be powered by a new twin-turbo 4.0-liter V8 engine that develops around 600 hp. The engine is also expected to be used in the LC F.