Watch this video of a test drive of a 1000 horsepower Forza Stage 4 Hellcat. Here are the four stages available from Forza Tuning and Performance: Stage I: Brisk Spark Plugs, 160 Degree Thermostat, Custom Dyno Tuning Stage II: ARH headers (2" primaries), Cat delete pipes or high flow cats with the stock cat- back bi-modal exhaust, Custom Dyno Tuning Stage III: Custom Porting on throttle body & supercharger, custom supercharger pulley, over-drive pulley, Custom Dyno Tuning Stage IV: Convert to E85 fuel! https://www.youtube.com/watch?v=WA_swIMO9d4
