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General Motors filed a trademark for a Holden HSV GTS-R model, bolstering rumors that it will produce a ZR1-powered super sedan for Holden's last hurrah.

Today at the Melbourne Auto Show in Australia, GM's Holden subsidiary is rumored to debut a new super sedan based on the Commodore and developed by its highly capable Holden Special Vehicles division. The exact nomenclature to be affixed to the sedan's flanks is unknown, but we expect a suitably sporty one like HSV GTSR, or something to that effect. It will powered by the 7.0L LS7 V8 from the Chevy Corvette Z06, which makes 505 hp in the Vette but will likely be detuned a smidge to just under 50

Since last summer, rumors have swirled in Australia regarding a potential "flagship" HSV GTSR. The original scuttlebutt had GM's Aussie performance division dropping the Corvette Z06's LS7 V8 into one of its fully-tricked, Commodore-based sedans. That never panned out. In the interim, we've seen the introduction of the blown, 620-horsepower, 6.2-liter LS9 V8 in the Corvette ZR1, as well as its less-caffeinated brother, the 550-horsepower LSA, in the Cadillac CTS-V. As such, the time is nigh to c