Mahle MS Piston Ring 4.310in +.005 1.5mm 1.5mm 3.0mm 1cyl File Fit Rings

These Mahle MS piston rings are precisely sized at 4.310 inches with a +.005 inch overbore specification, designed for a single cylinder application. The ring set features a common 1.5mm top ring, a 1.5mm second ring, and a 3.0mm oil control ring, all of which are file-fit style. This means you can precisely gap them to your specific cylinder bore and application needs, which is crucial for optimal engine performance and sealing.

Mahle is a well-known name in engine components, and this ring set reflects their focus on providing well-built parts for engine rebuilding. The file-fit design is popular among mechanics who want the flexibility to achieve a perfect seal, especially in custom or performance engine builds where precise ring-to-wall clearance is critical. Proper gapping helps prevent blow-by and ensures the rings seat correctly against the cylinder wall for good compression and oil control.

Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for detailed installation instructions and recommended ring gap specifications.