When the 2015 Corvette Z06 was introduced earlier this year, Chevy engineers played coy with the exact power output numbers, likely with an eye on what was cooking across town at Ford and Dodge. Last night, Corvette chief engineer Tadge Juechter laid down his marker, revealing the Z06 makes an astonishing 650 hp and 650 lb.-ft. of torque — the most powerful vehicle to emerge from a GM factory since it stopped making locomotives.

For perspective: There are only seven cars available in the United States from a major automaker that offer more power under their hoods; six of them come from European luxury supercar makers Ferrari, Porsche, McLaren and Lamborghini, costing at least twice what the Z06 will, for what may be little to no edge in performance.

The Z06’s power plants it squarely against the SRT Viper, which was already huffing to keep pace with the previous-generation ZR1 Vette; with more power and a more up-to-date chassis, the Z06 becomes the favorite in any future head-to-head matchup. It also raises more pressure on Dodge with its own supercharged 6.2-liter Hemi “Hellcat” engine, which it said would also surpass 600 hp by an unspecified amoutn.

The only Detroit car that can match the Corvette Z06’s stamina was also the only one left off of Chevy’s own list of comparable vehices: the 2014 Ford Shelby GT500, with its 662-hp V-8. The Shelby may take a pause while Ford launches the new generation of Mustang, but its undoubtedly getting its own makeover for the modern platform. The horsepower wars have come back to Detroit, and enthusiasts will be the ultimate winners.