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The Mahle Fire Power PC479 standard-tension plain ring set specified for a 4.375 inch bore supplies OE-style plain piston rings for engine rebuilds. Intended for applications matching Mahle OE specifications, the set supports restoring compression and oil control when replacing worn rings during a top-end service or full engine overhaul.
Mahle Rings Fire Power PC479 Std Tension 4.375in Plain Ring Set
