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I just bought a set of Rapidfire #5 at Pepboys (same thing in the car now). I'm going to go out to the barn and cut back the electrodes. I just want to know what you gapped yours at after doing this?
I have always installed FR5LS plugs and have gapped them at .035. I am still amazed that the owners manual and the service manual (GM's) doesn't say what plug should be used and what the gap should be. WHY ??????????????