ratings

Hi All, Finally getting new rubber for my 04' stock rear wheel. Looking at the Metzeler's but confused by the ratings. The OEM's have a V rating. When I look at the big selling sites, I see the Metzeler 880 170/80/15 have an H or HB rating? Can I use these? Not sure what the HB rating...

Is there a difference in horsepower throughout the years of the vmax? I have a 95 Vmax and i have heard anything from 100-145hp. What would is the correct number? :confused2: