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Mahle oil-ring expanders for 4.030 in bores, 3.0 mm standard-tension specification, sold as an eight-piece set. These expanders restore and maintain proper oil-ring spacing and tension during rebuilds and routine engine maintenance. Supplied to match the listed bore and tension, they simplify replacement of worn expanders to help control oil consumption and preserve ring stability.
Mahle MS 4.030in 3.0MM Oil Ring Expanders - Standard Tension
