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terry1 · 11-25-2014, 08:21 AM

I have purchase 3 set of AR-13 plugs this season and each set has been in the engine and iI check my plugs after every race that I have attended and after every race there was a problem with at least one plug mostly the porcelain was cracking.The saving grace of it all was NAPA took back each bad plug and gave me a new one.

That is interesting.I have never had an issue with my AR-13 plugs.

11-25-2014, 08:21 AM	#33
terry1 Member Join Date: Sep 2006 Location: Moncton, N.B. Posts: 276 Likes: 24 Liked 24 Times in 13 Posts	Re: Spark plugs I have purchase 3 set of AR-13 plugs this season and each set has been in the engine and iI check my plugs after every race that I have attended and after every race there was a problem with at least one plug mostly the porcelain was cracking.The saving grace of it all was NAPA took back each bad plug and gave me a new one. That is interesting.I have never had an issue with my AR-13 plugs.