Thread: Colder spark plugs, really?
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Old 03-20-2021, 10:59 AM   #3
Robert986
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Join Date: Feb 2017
Location: Stockholm
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I think I'll go with "one colder" but which one would that be? I guess 14FGR6KQU is a grade 6, so I want a grade 5, but cannot find anything called 14FGR5KQU
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