Just slap a supercharger on it.
The news comes from Motor Authority, who claim a reliable little birdie told them of Chrysler's plans. The blower will supposedly bump the 6.4 liter V8's flywheel output up to 540-570 horsepower, a 70-100 horsepower bump over the naturally aspirated version. The supercharger will reportedly come as a factory part, but will likely also be available as an aftermarket bolt-on for cars purchased before the option arrives.
The article specifically says the Dodge Charger and Challenger will receive the Eaton, but since the Chrysler 300 SRT8 shares the LX platform with those two vehicles, we'd be surprised if it didn't receive the supercharger option, too. However, Motor Authority does specifically mention that the new Jeep Grand Cherokee SRT8 will not be receiving the supercharger. That said, if the blower is designed for the 6.4 liter Hemi, we're willing to bet it wouldn't be too hard to finess it under the Jeep's hood.
The blower supposedly arrives late in 2012, in time for the 2013 model year. By that point, Chrysler's new eight-speed automatic should have landed in the SRT8s as well, so if you're thinking about trading in your old moonrunning machine for a new top-of-the-line Charger, you might want to wait it out another year and a half. [via Motor Authority]
Pictured: 2012 Dodge Charger SRT8