spark plugs for modded M30?

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  • weaksauce
    E30 Addict
    • Apr 2009
    • 550

    #1

    spark plugs for modded M30?

    i need a spark plug 2 ranges colder than stock for my motor build.
    anyone have any recommendations on plugs?
    the NGK 5077 is the stock plug. by the chart i would need a 7077, but ngk doesn't make that plug.

    ideas?
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