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Re: Bore
Boring your cylinders makes them weaker. Going .020" over is such a small displacement gain that any horsepower gains from it would be hard to even notice. How the new rings seat will possibly have a bigger effect on how the new motor performed. If you went from stock bore to something like .080", then you might seeing some performance gains from the increase in displacement, but you can't go too far before the cylinder walls are too thin for high HP.
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