[BadStratRT]

Stage 1 Supercharged
-Vortech Centrifugal Style Supercharger making 5.5 pounds per square inch (PSI) of boost
-Speedfactory Stage 1 Tune
-Unique 20” Forged Wheels
-Speedfactory interior and exterior upgrades
- 3 year, 36,000 mile warranty applied to the motor along with the factory warranty
-Results: Speedfactory states that the Stage 1 Supercharger kit takes your 5.7L Hemi to an impressive 470 crank horsepower, and a similar increase (27%) would give the 6.1L Hemi 540 horsepower, but that is once again completely speculative.

Stage 2 Supercharged
-Vortech Centrifugal Style Supercharger offering up to 8 psi of boost
-Boost levels selected by the owner
-Speedfactory Stage 2 Tune, based on the amount of boost chosen
-Unique 20” Forged Wheels
-Speedfactory interior and exterior upgrades
-There is still a warranty offered for the Stage 2 kit, but the motor warranty is not offered if the car is tuned for over 5.5psi of boost.
-Result: When the maximum amount of boost is chosen, the SRT-8 Challenger makes a whopping 630 horsepower at 8psi. Again, there have been no specifications given for the 5.7L engine, but at 630hp, the 6.1L engine is gaining almost 50% more power over stock!