I was using the denso iridium IK22 for a long period. They are very good but it has one issue. On the cylinder #2 has often unscrew itselfs. Not just on my car.
So now with new mods on my car I am using BKR7EQUP laser iridium for a price 85EUR for set of four.
They are not cheap (like denso one) but I hope they won't unscrew itselfs on #2 cylinder. For now I have only 300km with them so I can not tell a lot about it.
But for the price of
JCW spark plugs (they are identical) they were cheap.
