Yes.
I tried this on a turbocharged honda crx(b18 + big turbo) and a slightly more discret version on my dailly golf mk4 tdi, this mod with a lower front and all gaps closed you higher top speed or get there, i also smooth all the under car side and use lightweight magnesium wheels with a very "closed" design for better aerodynamics, i noticed all this mods on my dailly car, i get better fuel economy and the car is faster.
Sorry if i can't make me understand well, i'm not english fluent, sometimes i have some difficulties to express myself
I reccommend you to check photos of well builth cars, big winners and big thinkers spend a lot of time looking at details that no one looks, thats why not everybody can be a winner at drag strip, you can use the fuel saver design technology in a drag strip, because fuel savers, save a lot of power, allways remeber that.
This is a car builth for high speed records, take a look at the duct tape, all gaps are carefully taped.
