4.8, Sport Package with 19s, mine are Michelins.

When I was touring the factory at the end of May, all the tires in every size I could see were Bridgestones; then again, they only keep 2-4 hours' worth of parts in the factory at any time, so it may be the luck of the draw. Or maybe there wasn't a 4.8 w/ Sport coming down the line for a few minutes yet...