Thread: Champion No. 20 Spark Plugs
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Old 04-11-2019, 04:38 AM   #12
Bob-A
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Smile Re: Champion No. 20 Spark Plugs
I checked my Feb. 1936, Champion Spark Plug Service Type Selector for Passenger Cars. And no number 20 plugs are listed. The #20 plugs must be for commercial, farm or industrial use.


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