MAHLE piston ring set for engine service, identified by manufacturer part number 6420300024 and catalog code 00523N0. Catalog evidence shows 6420300024 on the MAHLE product record and classifies the item under piston rings, one-piston set. The catalog also lists related numbers A6420300024 and 08-427400-00; these are provided as cross-reference data, not a fitment guarantee. Verify bore size, ring dimensions, and engine application before purchase. This description intentionally makes no unsupported claim about a specific vehicle, warranty, quantity, or OEM status. Product image is from the exact catalog page.