They're 00R style wheels, no closer pic needed. They'd also be out from the front fender and almost flush with the back one on a 94-98 car if they were OEM, the replicas are narrower. I guarantee they are the 18x9 replica rims AM sold up until last year.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.