This certainly isn't the first time we've heard rumblings about Lexus working on a performance version of its GS sedan. The crew at Road & Track reports that the upcoming GS-F will serve as the range-topping trim in the GS model range, set apart from its siblings with not only a more aggressive appearance, but a serious increase in power, to boot.

Sources within Toyota have told the buff book that the GS-F will be powered by a 5.0-liter V8, just like the smaller IS-F, but that output will be increased to 465 horsepower for the larger sedan. The other key ingredient to making the GS-F a serious performer is a substantial reduction in weight. Through the use of aluminum and carbon fiber components, Toyota aims to have the GS-F weigh in at about 3,700 pounds, meaning it should be capable of ripping off 4.5-second 0-60 times.

Toyota is positioning the GS-F to compete with the likes of the BMW M5 and Mercedes-Benz E63 AMG, with prices to start somewhere around the $90,000 to $100,000 range. No official timeframe has been given on when we'll actually see the GS-F, but R&T states that it could show up as early as 2012, after the refreshed GS range debuts.