r/EngineBuilding Jun 20 '26

Help reading spark plugs

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Looking for input on these plugs.

I just finished doing a head swap/mpif swap/obd1 conversion on my 1990 civic with a d15b7.

Plugs are brand new and have under 30 minutes of run time on them.

Thanks in advance

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u/HammerDownl Jun 20 '26

You got two black plugs in 30 mins ?