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Believe it or not, if you want the best performance, a standard copper plug is the way to go. All those platinum 2, 4, split blah blah are gimmicks. The only thing they are good for is longevity if anything. Copper is good for conductivity whereas platinum is good for longevity. NGK makes a good plug, I reccommend them. The only drawback to copper plugs is you'll have to replace them a bit more often then platinums. I'm sorry to say, but in a boosted application like yours, I would switch to an NGK next time. Nice ride.
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