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all I can say for sure is that they stick open & cause spark plugs, COP's, O2 sensors & catalytic converters to be replaced.
If you are looking to figure out if there is a BETTER brand out there we can replace these with to guarntee this is no longer an issue, let me know when you find it. I would gladly replace all 8 in my '05 to not have to worry about that again.
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