Those are not iridium plugs. I'd suggest staying with iridiums. My forst choice would be Denso IK series, followed by NGK Iridium IX series.Franky_RedWine said:http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf
stock 1ZZFE spark plugs NGK: BKR5EYA-11 or DENSO K16R-11
I've bought NGK BKR6EYA-11. Boost 8psi (peak) looks very nice but need to change at max 10k km
Yes I know it's metal.I asked what kind of spark,so I mean what Electrical resistivity is better for sparks plug? I'm sure that the lowest is the number the better is the sparksSickCelica696 said:Iridium.