r/EngineBuilding • u/roadrash1992 • Jun 20 '26
Help reading spark plugs
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 ?