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Originally Posted by bnaylor
Why do your discard the metal shields?
They serve a purpose. To shield the spark plug boot and plug from heat and are used for anti-static suppression due to the high voltage which may be picked up by the sound system and other electronic components.
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In most cases I agree that the orginal stuff should go back on. In this case I talked to quite a few mechanics and the discard the metal shields the cause more problems then they are worth. The new quality plug wires can handle the heat.