YR3V-8620-BA is the original belt part number. This interchanges to a Dayco part number 5060830 or a Napa 25-060832.
I replaced mine with the NAPA 25-060832 and it fits correctly.
Thanks guys. My original is ok, but figured its time to replace now that its 16 years old!!! I'll pop on the napa version and keep the original for posterity....