Review on Denso SK20HR11 Iridium Spark Single by Joshua Mejia

I changed the spark plugs for the first time at 123,000km as a preventative maintenance measure as my FJ was running fine. I can't say my truck runs any better, but definitely no worse, so I'd say it's at least the perfect replacement for OEM spark plugs. NOTE: The OEM spark plugs I pulled out were also DENSO, just not Iridium. I expect long-life iridium candles to last even longer, but we'll see. This is my third TOYOTA (Celica, Tacoma and now FJ) so I know I can't go wrong with TOYOTA quality.