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Old 05-21-2013, 11:32 PM   #2
Tom Wesenberg
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
Default Re: Is there Difference between Champion 3X Spark plugs

I don't think so, as there is only the modern repro 3X being sold now.
It's too bad the thick hex for 28-9 isn't being made.

The 3 now has a flat top, and the knurling is also wrong.
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