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Gardner Denver Piston Ring Replacement - 65A342 80447527 IR UP6-7.5 2013 7.5 HP We have the Purolator OilGardner Denver Piston Ring Replacement 65A342 Designed for air cooled reciprocating compressors, the Gardner Denver Piston Ring Replacement 65A342 delivers precision sealing to restore optimal compression and minimize oil carry over. Manufactured to OEM grade tolerances, this piston ring ensures reliable cylinder sealing and efficient operation under heavy duty conditions. Why It Matters: Restores Compression Efficiency: Maintains cylinder pressure by