https://bmwsparkplugs.com/products/n...26686704058468
I have the bosch ones that are mentioned on this website.... pretty much same thing as the NGK plug mentioned there... both are iridum.
I have mine gapped 0.022"(0.56mm) Works fine for stage 1. Maybe a bit overkill as its said to be for cars pushing 400hp or more. I havent had any issues with it.
FCP euro gives 2 gapping measures:
Quote:
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N54 applications require the spark plug gap to be changed to OE 0.7mm (0.0275″) or 0.56mm (0.022″) for high boost
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ECSTUNING says to gap at 0.022" aswell..
https://www.ecstuning.com/b-ngk-part...six/n54plugkt/
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2009 35i DCT Havana brown with ivory white interior. Mods: Cobb stage 1+FMIC, Wagner EVO1 FMIC, BMS DCI, KW V3 suspension, M3 front control arms, Hardrace RTAB, Michelin Pilot Sport 4S tires.