Porsche 996 Turbo K16 GIAC Performance ECU Software UpgradeGIAC performance software helps you extract the maximum potential from your Porsche 996 Turbo. Power gains were measured at: 50 wheel horsepower and 77 wheel torque on 93 octane Estimated crankshaft power output of 479 horsepower and 504 lb. ft. of torque Hardware requirements: Turboback exhaust highly recommended Other benefits to GIAC performance software include: Improved fuel economy Improved throttle response Factory levels of drivability Removed