However, using the NGK website part finder:
http://www.ngk.co.uk/ It NOW recommends std plug: DCPR8E
or Iridium Plug: DCR8EIX
which is not how I remember it, to tell the truth. There did used to be some differences when cross-referencing from one manufacturer to another.
If all else is Ok i'd try a std plug first, the if you want to try an Iridium plug or some other in a little while you can always keep em as spares!
Good luck - Frank