iridium

The manual for my 8th Gen 2.0L requires IZFR6K11NS but I can only find IZFR6K11S online which are available in the UK (and a few fake NGK spark plugs as well). I have researched the difference and understand that IZFR6K11NS is a non-resistor plug while IZFR6K11S is a resistor plug. My...