QST ECU Software Audi RS4/RS5 B9

QST ECU Software for the Audi RS4/RS5 B9 2.9TFSI. Our Software has been expertly developed on the dyno and tested vigorously on the road to provide a fully developed tuning solution offering exceptional gains in HP and Torque throughout the powerband and drivability exceeding expectations whilst still maintaining complete reliability as you would expect.

Stage 1: 510, 740NM Torque

Stage 2: 530-540HP 7600NM Torque