Following Logan's most excellent post on wheel/tire fitments on the Gen III Coupe, here is some info on what I've been running for the last 3 years and 12,000 miles.
The backspacing on these is listed as 6.2"- no good on the Coupe. My brain only works in backspacing and this is key to avoid the 'usual' rear tire/frame rub issue.
I ran 2" hubcentric spacers in the rear and occasionally 1" spacers in the front. The attached pics are with 2" rear spacers only.
Tires are Nitto NT01 275-35-18 front and 305-35-18 rear- no rubbing and no issues.
I'm running 700lb front and 500lb rear springs, 4" ride height all around.
Front sway bar one hole away from full stiff (can't get to the last hole) and no rear sway bar.
I really do/did not like running the rear spacer, so I've just retired this wheelset (more on that later).
This was a good set of wheels that have had the tires changed 3x all around- each wheel is cheaper than a single tire and are consumable/disposable at their price.