Mahle MS 4.125in 3.0MM Oil Ring Expanders - Standard Tension

Mahle is a well-known name in engine components, often supplying parts for original equipment manufacturers. These Mahle MS oil ring expanders are a key part of your engine's oil control system, designed for a 4.125-inch bore size and standard tension. They work with your oil control rings to ensure oil is scraped efficiently from the cylinder walls during the piston's downstroke.

Properly functioning oil ring expanders are crucial for preventing excessive oil consumption and maintaining good compression. This set features standard tension, which is suitable for most general rebuilds. They are made to fit precisely within the oil ring groove, ensuring consistent pressure against the cylinder wall. When rebuilding an engine, using well-made components like these Mahle expanders helps ensure long-term reliability and performance.