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13.5:1 comp. ratio pistons and Premium Pump Gas???

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Anyone using a 13.5:1 piston in std. bore size and pump gas? Pro Circuit advertises that you can use their high compression piston(13.5:1) with pump gas. Anyone have any experience doing this?

Thanks,

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13:5 piston works great! But get the JE piston it's the same one as PC but cheaper.

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ran my '08 with the je 13.5:1 all season on 93 octane and it ran fine. no problems here.

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