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Mahle CP20 oil ring expander set is sized for a 4.650 in bore with a 3.0 mm expander thickness in a plain ring configuration. This expander set supports piston ring assemblies during top-end rebuilds where the specified bore and expander dimensions are required. It serves as a replacement component in ring packs that rely on correct expander sizing for consistent oil control.
Mahle Rings CP20 Oil Ring Expanders 4.650 Bore x 3.0MM Plain Ring Set
