Engineered with Strict Industry StandardsExtensively Tested Under Various Driving ConditionsFactory Safety Limiters RetainedOptimized Responsiveness and DrivabilityOptimized Smoothness and Driving ComfortPower Delivery Perfectly Optimized Throughout the Power BandImproved Fuel EfficiencyIgnition Timing Precisely Calibrated for Higher Octane FuelElectrical/Electronic parts are non-returnable.