Hi Bruce, I'll have to check out that site. RIKEN of Taiwan makes all the rings for Wiseco and ART, the OEM piston vendor. I doubt if they will fit Wiseco pistons because OEM rings don't interchange.
Theres a lot to the design of a ring, tangental force (tension) material and coatings. Perhaps Matrix Imports is a distributor that re-packages parts.
But then again I don't know what I'm talking about, I'll call someone in Corona for the correct answer :silly:
I just checked out the site, they're in Schaumburg Illinois, thats where my parents live. I'll give these guys a call and get back to you guys with more info.