Iridium plugs and BMC filter

I have heard good things about Iridium plugs, but they are about NZ$27 dollars each and too expensive.  Well, Ebay sorted that with a set for NZ$53 delivered, and I fitted them today.  I doubt I will feel any difference, but they won't need replacing for a long time.

The NGK part is CR7EIX

I also have a BMC filter fitted, so gave that a clean and a re-oil using the BMC cleaning kit.  Very much like a K and N.  Despite daily riding and an opened airbox, very clean.