Boosted air into boosted air equals HP!!!!!!!! WWII planes were turbo and supercharged, this is old school tech.
Bottom end needs extensive work to handle all of that boost from a turbo and a supercharger. Upgrades to the supercharged boost is the way to build power. Dodge has 2 upgrade stages currently available at Direct Connection Dodge dealers that will take the Redeye Challenger up to 935 hp which will run in the high 9's on the 1/4 mile. A 3rd stage that is currently being tested by Direct Connection (formerly SRT) will take the Redeye over 1000 hp. I haven't heard if these upgrades are available for the Redeye Charger but I assume so.
And.....the factory warranty stays intact. The turbo instantly voids the warranty.