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I had a bad experience using other than OE plugs (they lasted less than 30,000 miles) so I stick with the NGK on our 3.0s now. I've exclusively used bosch platinum on previous cars though, and if other people have good luck with them i wouldn't recommend against them. I don't have a 4 wire gap tool, but was careful to check the cardboard protection tube was intact and each plug looked as if factory gap was identical.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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