Mahle MS 4.155in+ .005in 1.5 1.5 3.0 mm File Fit Rings

Mahle is known for making solid engine components, and this set of file fit piston rings is no exception. If you're rebuilding an engine and need to ensure a proper seal between your pistons and cylinder walls, these rings are a well-built option. They feature a standard tension design with a 1.5mm top ring, a 1.5mm second ring, and a 3.0mm oil ring, all designed to be file-fit for a precise installation.

The +.005" sizing indicates these rings are slightly larger than standard, which is crucial for engines that have been bored out or have had some wear. File fitting allows you to precisely set the end gap, ensuring optimal compression and oil control for your specific engine build. This attention to detail in the ring design helps maintain good cylinder pressure and prevents oil from entering the combustion chamber.

Keep in mind 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 procedures and recommended ring gap specifications.