On College st in Guelph An old 911, small, narrow, skinny tires,no rear spoiler BRG with a wide yellow stripe across the rear end and over the roof. Had that old aircooled 6 noise...not 'mellowed' by a turbo I'd say. It was accelerating fast away from me so I only saw it for a few seconds.
I haven't seen it before I wonder if it is local.