Speedster: I like your nose! The car in general looks coherent, it looks like it has an all-fiberglass body. your problems are easy to adress: the front opening, just copy/paste the original mouth opening and make it bigger, so it wont just look like you put a black layer there, and it actually has borders. 'Sides, you're gonna fill it with mesh anyway.
For the nose openings and the headlamp covers, as these are custom made pieces, I don't know how you traced them, I'd suspect it was with the lasso pen tool. However, they look too sharp. Just give them a blur filter and see them magically integrate with your car. The side air intake is the most ambitious part, complicated to achieve.
And it could use some rivvets in the rear side window, and some reflections or carbon fiber texture, as could the headlamp covers.