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--> Add to Favorites Home About Us Feedback New Arrivals Ending Soon Contact Us --> CP Pistons BC625+ Rods Silvia 240sx S13 S14 SR20DE SR20DET 9.0:1 86.5mm Description 17mm width bearing These pistons are +0.50mm (or 0.020 inches) over bore. This is often referred to as "Twenty Thou Over". Many times when an engine is being rebuilt after a failure, the cylinder walls are slightly damaged, requiring the clinder hole to be bored out. This process removes any surface irregularities from the cylinde...

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