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ESS Normal Aspiration optimized ECU software is a result of 100's of dyno runs and exact calibration of all parameters to allow maximum performance gains with improved driveability/fuel consumption and stock engine longevity. RPM limit is increased and top speed governor is removed.
Throttle response programming is greatly improved over stock.
Power is increased by 4HP and 3lbs/ft of torque when programmed for premium fuel (91US/96Euro).
Special programming for custom setups are available on request.
When you order this product, you will receive information on how to remove your ECU for shipment to a ESS reprogramming center near you.
Application intended for: E85 Z4 2.5i