I did my lower grill block mod, i used vertical strips of white duct tape and taped it all the way down, then I used horizontal strips all the way across the bumper to make it look aesthetically pleasing.
Thanks to cfg83 I also got the "racing disk" aka "moon" hubcaps, that should improve aero slightly.
Here is the original:
Here is my mockup:
Here is my final result:
Again original:
And final:
Last time original:
Aaaand final result: