Ngk 4091
04-05-2010, 10:52 PM
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Ngk 4091 So I was going to run a TR6 in my 383 NA until I spray it, then I'll switch over to a B8EFS. I was searching through my toolbox and found a brand new set of NGK 4091's (R5671A-7), which are a 7 heat range non-projected tip plug.
I have set of slightly used TR6's also. But my question is this, which would be a better plug to run until I do spray the motor? The TR6 or the 4091's?
I have set of slightly used TR6's also. But my question is this, which would be a better plug to run until I do spray the motor? The TR6 or the 4091's?
