MAHLE 9298909 Oil Ring Support Rail Bore - 4.125-4.185 3/16in

The MAHLE 9298909 is a 3/16-inch oil ring support rail designed for use in 3-piece oil control ring assemblies. Engineered to fit cylinder bore diameters ranging from 4.125 to 4.185 inches, this support rail provides the structural backbone for the oil control ring, holding the two thin oil rails in proper position against the cylinder wall.

MAHLE is a globally recognized OEM and aftermarket supplier of engine components, and this support rail meets the tight dimensional tolerances required for professional engine rebuilds. Whether used in a street performance build or a heavy-duty engine overhaul, the correct support rail ensures optimal oil control ring tension and consistent oil film regulation on the cylinder walls.

Key Features:

• Bore Range: 4.125 – 4.185 inches
• Ring Width: 3/16 inch (0.1875 in) oil ring groove
• Ring Type: Oil control ring support rail (expander/spacer component)
• Manufacturer: MAHLE — OEM-quality engine components
• Designed for use in 3-piece oil ring assemblies
• Precision manufactured for consistent ring tension and cylinder wall contact
• Compatible with a wide range of domestic and performance engine applications within the specified bore range

When rebuilding or overhauling an engine, using a properly sized MAHLE oil ring support rail is essential for maintaining correct ring gap, preventing oil consumption, and ensuring long-term engine reliability. Always verify bore diameter and groove width before ordering.