Well the Only 2 numbari in Yokohama tire is Smuggled tire, They are usually sold by the shop keepers as Dubai import or by other names but they are usually old stocks and not warrented backed by company, Well You can buy Origional Yokos from
City Tyre
Khalid Bin Walid
0300 8296666
they have the origional company ones, but for your surety dont forget to take the company printed warrenty card.