| As I remember reading a comment by Greg on here, iridium technology wasnt available when the Z was being made. There definitely is a 5 range iridium. I havent seen the 6 in my searching, which is why I asked here. Another interesting point is that the IX iridium plugs actually cost less than their platinum counterparts. Anyone know what the difference is between the NGK IFR5E-11 and the NGK BKR5EIX-11?
***** My alarm? Yes, it's in my glovebox. 
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