BMW 1M GIAC Stage 1 Performance ECU Software UpgradeGIAC performance software helps you extract the maximum potential from your BMW. Power gains have been measured at: 46 wheel horsepower and 23 wheel torque on 91 octane 64 wheel horsepower and 34 wheel torque on 100 octane Estimated crankshaft power output of 389 horsepower and 395 lb. ft. of torque on 91 octane Estimated crankshaft power output of 409 horsepower and 408 lb. ft. of torque on 100 octane Boost levels are approximately 14 15 psi Stage 1