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Champion RC12YC




Thanks. I was just digging around in the garage and came across 8 NGK XR51X iridium plugs- should I try those or just go buy 8 of those champions? Currently there are Autolite plugs in there. (previous owner installed those)

What gapping should these plugs be gapped at?




.035 gap, I had Autolite 3924's before. The car liked the champs better. I'm not sure if those NGK's are compatible. The champs are fairly cheap 1.99 each at Napa.