Plugs....
Here's an update on mine...no issues to date. About 2 ranges colder than stock.
https://www.cobaltss.net/forums/2-0l-lnf-performance-tech-153/update-ngk-iridium-ltr7ix-11-plugs-after-1000-miles-188462/
https://www.cobaltss.net/forums/2-0l-lnf-performance-tech-153/update-ngk-iridium-ltr7ix-11-plugs-after-1000-miles-188462/
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