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QST ECU Software for the 4.0TFSI Audi S6/7 C7. 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.
Power quoted on Shell V-power and Tesco Momentum 99 Fuels
*Must be used with APR Stage 2 TCU Software*