The Superchips Flashpaq F5 Performance Tuner part # SU3845 or part # SU4845 for California (CA) can provide the 5.7L V8 engine in your 2008 Dodge Charger R/T up to 13 horsepower and 14.7 foot lbs of torque. In addition to the increased power figures, the F5 tuner will also allow you to adjust and view several different engine/vehicle parameters. view full answer...