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Old May 14th, 2010, 02:48 PM
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whats the best
Whats the best spark plug for a performance application and why?
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Old May 14th, 2010, 06:37 PM
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I still use the stock delco r45S. They work fine for me.
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Old July 16th, 2010, 02:33 AM
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ngk
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Old July 16th, 2010, 04:11 AM
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depends on who you ask, just like filters, oil, and tires.

I keep my GM cars all GM when it comes to plugs.

Don't be pulled into the gimmick plugs and their claims
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