With careful, detailed remapping to the entire DME we have been able to increase your E39 M5's output by 20 HP and 20 ft lbs of torque for a normal street car. We also have different upgrades available for offroad use like top speed limiter removal, 02 Simulation, etc. The BI Performance upgraded software is designed to operate with gasoline that has an average octane rating with full emissions to create a clean burning combustion with good AFR’s all within factory specifications.

Key Features:

-Top Speed Limiter Removal
-Part Throttle Remapping
-Increase in Torque and Horsepower
-Throttle Response Tuning