This BMW 335d E91 with a 3.0-litre twin-turbo diesel engine had already been modified. The owner installed a larger intercooler, and the engine had been tuned earlier. The video says the previous setup produced about 330 hp and 745 Nm.

Automatic gearbox calibration

During this visit, XHP Stage 3 software was written to the six-speed automatic gearbox. The technician describes firmer shifts and a change to the gear display in D mode. These changes affect gearbox operation and do not, by themselves, confirm an increase in engine output.

Dyno result

The video gives a result of 355.5 hp and 777 Nm for the current setup. The technician links the larger intercooler to the improved engine configuration. The contribution of each individual modification was not measured separately.