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The Mahle 4.135 in, 3.0 mm oil ring expanders are a standard-tension replacement set packaged as eight pieces for matching oil rings to pistons of the specified diameter. These expanders restore correct ring spacing and support oil control during assembly and break-in. They are intended for engine rebuilds where standard tension expanders are required to maintain consistent oil-ring performance.
Mahle MS 4.135in 3.0MM Oil Ring Expanders - Standard Tension
