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Lund performed an initial test run to make sure systems checked out and then made three full passes on the dyno, working his magic to optimize the tune. It ended up making 331 hp and 299 lb-ft of torque. That’s an increase of 76 horsepower and 29 lb-ft of torque to the rear tires above the baseline figures. I was hoping for slightly higher numbers—don’t we all?—but Lund said the 4.10 gear ratio will drop the horsepower number down about 15-20. Also considering I had larger tires and that the air quality wasn’t the best that day, my Mustang was laying down good numbers. He’s seen Mustangs with similar mods, stock wheels, and a 3.31 or 3.55 gears putting down 365-370 rwhp.