Mahle Motorsports Single Cylinder File Fit Rings 4.06 inch bore

This set includes the individual piston rings you need for a single cylinder, specifically designed for a 4.060 inch bore with a +0.005 inch file fit. You get a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring, all with standard tension. These are file-fit rings, meaning they are designed to be precisely gapped by the installer to achieve the perfect fit for your specific engine build.

Mahle is a well-known name in engine components, and these rings are built for performance applications where precise ring-to-wall clearance is critical. The file-fit design allows for custom gapping, which is essential for optimizing compression and oil control in modified or high-performance engines. This approach helps ensure a solid seal between the piston and cylinder wall, which is key for maximizing power and engine longevity.

Remember that these are sold for a single cylinder, so be sure to order the correct quantity for your entire engine. Also, please note that these rings are not CARB approved and cannot be shipped to California.