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Which Is Better Copper Or Iridium Spark Plugs? [Solved]
Platinum and Iridium plugs perform at a lower level than copper spark plugs, because they are less conductive and they tend to overheat. However, the overall longevity of these two types of metal is better than copper plugs. In reality, copper has the best performance of all three and the worst longevity.27 Jan 2012
Stop Using iridium Spark Plugs! Copper Spark Plugs are Better - Pro Tips with Robby Joe Bob
Robby Joe Bob talks about
Cooper vs iridium spark plug @El Chano Jose
NGK
Best Spark Plugs for Performance!
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