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      02-23-2021, 05:39 PM   #2
435gc
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Drives: 2015 435i Gran Coupe xdrive
Join Date: May 2019
Location: Charlotte

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I would start with the stock gap especially for stage 1. Narrow gap is really for higher boost applications.

I would paruse the technical forum for your engine to hear more on spark plugs and gap. Lots of discussion on this topic there.

Last edited by 435gc; 02-23-2021 at 05:51 PM..
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