I've got the Falken 502 Ziex something or other. To tired to go out to the garage and look. I'm happy with my tires. They were a much better deal than the other high performance tires and I hear there new performance tires are good quality. I get real good wet tracktion and burnouts a real quiet, no major squealing, meaning the tires are a real hard rubber compund i guess. Would I buy a new set of Falkens? Yes , if I drive the limited miles I put on my car, in basically good weather. No, If I go to the track or drive in messy weather or alot of miles. You usually get what you pay for!. But if you are on a budget they are a really nice tire for the cost!!
P.S. mine have the two rain gutters down the middle.
Good luck