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Three months later, Marco tuned a twin-turbo LS-swapped BMW that three other shops had failed to get running right. Using , he drove the car for 20 minutes while the software adjusted the fuel map in real-time. The owner's face when he saw the smooth idle and perfect part-throttle cruise? Priceless.

Marco hung a sign above his tool box: "Stop Guessing. Start Analyzing." Underneath, a small logo: . efianalytics

Then he opened a feature called