Mahle MS 4.155in+ .005in 1/16in 1/16in 3/16in File Fit Rings

When you're rebuilding the top end of your engine and need a precise fit for your pistons, a set of file-fit piston rings is often the way to go. These Mahle rings are designed for builders who want to achieve optimal sealing and performance by custom-fitting the end gaps to your specific cylinder bore. This set is intended for a 4.155-inch bore size, with standard tension dimensions of 1/16 inch for the top two rings and 3/16 inch for the oil ring.

Mahle is a well-known name in engine components, and these rings are made to their standards for durability and proper function. The file-fit design means you'll need to carefully measure and file the end gaps to match your cylinder's exact bore size, ensuring a tight seal that helps prevent blow-by and oil consumption. This process is crucial for getting the most out of your engine rebuild, especially when dealing with non-standard bore sizes or performance builds.

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 detailed installation instructions and recommended clearances.