Porsche Cayenne Turbo (S) (2007-2010) GIAC Performance ECU Software UpgradeGIAC maintains the only true switchable software program for the Porsche Cayenne Turbo. Power gains have been measured at: 18 wheel horsepower and 39 wheel torque on 91 octane 48 wheel horsepower and 91 wheel torque on 100 octane Estimated crankshaft power output of 543 horsepower and 579 lb. ft. of torque on 91 octane Estimated crankshaft power output of 580 horsepower and 645 lb. ft. of torque on 100 octane *Power figures were measured on a Cayenne