Mahle MS 3.766in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

If you're rebuilding an engine and need to ensure a proper seal between your pistons and cylinder walls, a good set of piston rings is crucial. These Mahle file-fit rings are designed for builders who need to achieve exact clearances. The file-fit design means you'll need to gap these rings yourself to match your specific engine build, giving you ultimate control over the seal. This is a common step when working with custom pistons or when honing cylinders to a precise bore size.

Mahle is a well-known name in engine components, and this ring set reflects that. The rings feature a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil ring. They are manufactured to a +.005 inch oversize, which is important to note if you're working with a freshly bored or honed cylinder block. This sizing ensures a solid fit once gapped correctly. The standard tension is suitable for a wide range of applications where a reliable seal is the primary goal.

Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for proper installation and gapping procedures.