BMW 135i / 335i N54 GIAC Stage 1 Performance ECU Software UpgradeGIAC performance software helps you extract the maximum potential from your BMW. Power gains have been measured at: 53 wheel horsepower and 68 wheel torque on 91 octane 60 wheel horsepower and 97 wheel torque on 100 octane Estimated crankshaft power output of 361 horsepower and 382 lb. ft. of torque on 91 octane Estimated crankshaft power output of 376 horsepower and 410 lb. ft. of torque on 100 octane Boost levels are approximately 14 15 psi Stage 1
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