Just thought of an idea! JDM front fender well gap fillers
It looks like you have some gap between your tire and fender on the front. Having gap fillers would block turbulence from escaping this area. Cleaner air moving across the vehicle is more mpgs
It would be good to make them all the way to the top of your new cutouts. That way all air entering will have no choice but to exit in the cutout and flow along the body.
I plan on doing this same thing, but your car would do good with it also and your craftsmanship would be top notch.