For its 60th birthday, the Dodge Charger is getting an upgraded inline-six engine that Dodge says will make it the most powerful Charger Sixpack yet. We don't know specifics, but we expect a decent boost in power. The current Sixpack makes 550 horsepower, and upgrades could bring it closer to 600 hp. The new Charger Sixpack will be revealed during the Roadkill Nights event on August 8 in Pontiac, Michigan.