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Old 08-17-2020, 12:17 PM   #3
GMCPaul
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Join Date: Mar 2000
Location: Rockville,In. USA
Posts: 3,718
Re: Spark plug heat shields - worth doing?

It;s been shown that the heat shields reduce the temperature of the surrounding area the plugs and wires are placed in from exhaust manifolds and reduced temperatures equate to longer life of the part since heat related breakdown of the material they are made from is reduced.
Paul Jr @ GMCPauls
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