Dinan D900-B58-G-S1 is Stage 1 performance engine software for BMW B58B30O1 applications in the G01, G02, G20, and G29 platforms. Dinan states that no supporting parts are required for the advertised gains. The calibration optimizes boost, fueling, airflow, temperature controls, pedal response, torque-by-gear strategies, and drivability while retaining factory engine safeguards. Dinan lists calibrations for 91, 93, 100, 104, and E85 fuel and a limited lifetime software warranty.