Derringer Tuner Requires iDash Not Included for 17-19 Chevy/GMC 2500/3500 HD 6.6L Duramax L5P Banks PowerDerringer features 6 power levels adjustable on the fly. Interfaces with OBD II (On Board Diagnostics) to communicate with the vehicle's ECM. AutoRate uses vehicle data to adjust tune in real time. ActiveSafety protects engine powertrain. TransCommand protects transmission. For use with existing iDash DataMonster or iDash SuperGauge. Results in torque and power gains across the full operating rpm range, starting right off idle and marching to the