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Ramsey spun the rollers yet again with the new tune installed. The result was 422 rwhp and 401 lb-ft of torque. That's a gain of 31 rwhp and 37 lb-ft of torque. After a few weeks of driving on the new tune, Hall reports quicker tip-in response, much more noticeable low- and mid-range torque feel, and 2-3 mpg increase in fuel mileage. Not bad for a $400 investment.