Would a direct air intake make a positive horsepower difference on a 2007 2.4l 4cyl Galant?

Unlike the guy above me i might be able to help. Yes getting an actual short ram intake or full cold air intake will help and continue your trend. Not to mention it will give your motor a more "aggressive" sound under throttle. And actually most intakes actually improve your gas mileage as long as you can keep your foot off the gas all the time. Good Luck