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08-14-2021, 05:44 PM | #1 |
Senior Member
Join Date: May 2010
Posts: 315
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UD 16 Champion Spark Plug
Are they a good plug for A's?
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08-14-2021, 06:24 PM | #2 |
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Join Date: May 2010
Location: Oregon
Posts: 5,958
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Re: UD 16 Champion Spark Plug
I thought those were 18MM plugs.
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08-14-2021, 06:24 PM | #3 |
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Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,084
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Re: UD 16 Champion Spark Plug
I don't know what the U stands for, but D-16 is an 18mm plug so won't fit the A head. D series were the plug of choice for early after-market heads. 16 is the heat range and would be satisfactory for the A engine.
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08-14-2021, 07:44 PM | #4 |
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Join Date: Aug 2012
Location: South East Wisconsin
Posts: 1,279
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Re: UD 16 Champion Spark Plug
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