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just stick with the stock plats. I've never heard of halo's and I really don't trust a company that just jumps on the market for plugs.
the stockers are slightly expensive, but they're the absolute best for your application. You'll prolly notice better mileage when you put them in simply because they're new.
As for the guy saying they gave more power, he doesn't know what he's talking about. Spark plugs don't give you more power.
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