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Mahle MS 4.500–4.560 3mm piston ring support rail is a purpose-made support rail sized for 4.500–4.560 bore engines. The 3mm rail is provided as a precision fit component for ring support during installation or rebuilds, giving an OEM-style replacement rail for engines that call for this specific dimension in their piston ring assembly.
Mahle MS 4.500-4.560 3mm Support Rail
