Review on π₯ DENSO IK20 Iridium Power Spark Plug - Set of 4 Ignition Plugs for Racing Upgrades by Thomas Drew
What happened to CC?!
In my engineering career I have installed tons of Denso spark plugs and cursed the Denso and NGK brands. This is the first time I've seen 2 out of 4 connectors have very bad thread burrs. Had to run the crystal to clean it before installing. QC is not currently working for you? Other than that, it's usually a very reliable brand.
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