Mahle MS 4.155in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

This Mahle ring set includes the necessary piston rings for a single engine, featuring a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring. These are file-fit rings, meaning you'll need to gap them yourself to precisely match your cylinder bore. This is a common practice when rebuilding engines or working with custom bore sizes to ensure optimal sealing and performance.

Mahle is a well-known name in engine components, and this set is built to their standards. The file-fit design allows for a custom fit in your cylinders, which is crucial for proper compression and oil control. The specific sizing of +.005 inch means these rings are intended for a bore that is five-thousandths of an inch larger than the standard size for the piston they are designed for. This attention to detail in sizing and the ability to custom-gap the rings helps achieve a solid seal between the piston and cylinder wall, which is essential for engine health and power.

Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your vehicle's service manual or a professional mechanic for proper installation procedures and specifications, especially when gapping rings.