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Latest AC Spark Plug # for LS1 Please
99 Coupe 6mm 123,000 miles all stock. I require the latest # so that I can replace AC # 41 - 985 with 60,000 miles on them. Secondly, yes or no to Anti Seze or Mobil 1 on the threads ?- TheBigGuy
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- Forum: C5 Technical and Performance