That is an H speed rated tire, but the 360 treadwear means its a bit hard in compound. That is a good thing if you want to get some decent mileage out of it. I'd say it may be good for 20-30k depending on how you drive.
I believe that is the DB offering of the Maxxis Maruader mentioned further above with a Redline sidewall cut into it:
http://www.maxxis.com/AutomobileLigh...-Marauder.aspx
I was hoping the original poster whould chime about the performace of the MT SRs and why he wants to change. It is a widely availble, reasonably priced tire design with an H speed rating. MT does not preovide a treadwear rating because of the softer compounds they use, but the conversation I had with their tech suggested these would be a 15-20k tire, which means a softer compound.
There also are Avon tires if you want sticky, wide 15" tires with decent sized sidewalls:
http://www.avonmotorsport.com/historic/road-legal/cr6zz
Hoosier Pro Street is another option, although they do tend to get taller as you get wider;
https://www.hoosiertire.com/strttire.htm