Thread: Spark plugs gap
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      06-16-2020, 07:15 AM   #5
3FortyI
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Drives: 340i
Join Date: Jul 2018
Location: Atlanta

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If it helps.. I was on OEM plugs when I had stage 1 and 2 on MP tune. Stage 2 is with downpipe.

Recently went with NGK and gapped them, and it rides much much better. I'm switching to MHD soon and will re-gap/assess every 10k miles or when oil change happens.