my 1st Z32 in May '89. I think the auto NAs were Bridgestone, but not sure. The Michelins sucked big time on wet pavement and were dangerous in light snow. You couldn't even steer with them. I don't know what the turbos came with. Check with SilverTwin (Ohio). His uncle has a '90TT with 700 miles on it. For sure he has the original tires.