maybe easier with a photo- The red lines show where the screws go into the rebar, which is really a sandwhich of the bumper skin behind the grill, foam and the rebar itself that you won't actually screw into unless you use a 4" screw.
I suppose if you crouched down and look straight at it...
I'm assuming you're talking non-nismo. The plate frame has mounts that tuck in through the grill and screw onto the bumper skin/foam rebar behind the grill, and then has little "arms" up top that hang onto the grill and clip in. If you remove the bracket, you won't see the screw holes...
they quite literally are jekyl and hyde, the passenger and driver seats have different bottoms, the driver has that little thigh-separator hump.
I'm in the same boat, bigger guy (6' 280lb) and find that I'm sitting on the bottom bolsters. I like the back rest, but the bottom seat is just too...
Yeah JDM aero is real spendy these days. You're into 3d printing I'm working on a whole aero set for the RZ34 similar to what I did with my FK8. It won't be done until early next year but I'm aiming to have the front bar, a few front lips, side skirt or aero splash guards and a few spoiler...