Yea, but he probably races the car around like a maniac. Besides, I've seen a lot, lot worse stock MK1's with air dams bashed beyond belief. Also, looks like the fronts are smaller than the rear rims. So, I would say 16 front and 17 rear maybe. I have a few more angles of this car. Maybe I should post them.
Well, I doubt he has any trouble scraping unless he has to go down steep inclines. That suspension will not move or it would be rubbing all over the place. Besides, that is actually one of the better air dams I have seen on 87+ MR2's. Most of them are in pieces or falling off, this one just needs paint. I have 16" with more than a 1" drop and I have no trouble. Now, when mine was stock suspension I scraped every now and then b/c the suspension is too soft.