Rick, I have no idea if they are any good or not, read this link and the responses in the links in the middle of the page. sounds like yokohama makes them and they are not very good. Tires, youusually get what you pay for so I would stay with a brand name like yokohama AVS or nitto 555's or comparable. I still have the stockers on my rims but i think i will upgrade to nitto 555's when i burn these off!
I should have checked into what I was buying more, that is what I get for special ordering tires from a woman, lol, she thought they were made in USA, lol, they are made in Taiwan.... I have only had my car up to 130 mph one time that I know of, and that wasn't intentional, just farting around, its certainly not something I do a lot, so I am probably ok most of them time with H rated tires, but I would really have rather had Z rated.