Audi S6 / S7 4.0T GIAC Performance ECU Software UpgradeGIAC performance software helps you extract the maximum potential from your C7 S6 S7 4. 0T. Power gains have been measured at: 77 wheel horsepower and 123 wheel torque on 91 octane 103 wheel horsepower and 141 wheel torque on 100 octane Estimated crankshaft power output of 536 horsepower and 564 lb. ft. of torque GIAC numbers are measured on a Mustang MD 500 dyno, to all four wheels. Because this dyno produces load equivalent to traveling on an actual