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Arias 9.8:1 high silicon forged pistons weigh 724g and have generous valve relief notches. The increased silicon content minimizes thermal expansion so tighter 0.006-inch skirt clearance can be used for better oil control and piston life on this street engine. The ring package is from Speed Pro and uses 1/16-inch chrome-moly top rings (0.018-inch end gap), 1/16-inch iron second rings (0.014-inch end gap), and 3/16-inch oil scrapers. View Related Article
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