Mahle MS 3.662in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

Mahle is a well-known name in engine components, often supplying parts for original equipment manufacturers. This expertise translates into their aftermarket piston rings, like this 3.662-inch set designed for custom engine builds. These rings are specifically the file-fit type, meaning you'll need to gap them to your specific cylinder bore for a precise fit, which is crucial for optimal sealing and engine performance.

This set features a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil ring, all with standard tension. The +.005 inch sizing indicates they are intended for bores that are slightly larger than standard, often found after a hone or bore job. Proper gapping is key to preventing blow-by and ensuring your engine runs efficiently and reliably.

Because these are file-fit rings, they are intended for builders who want precise control over their engine's tolerances. Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine build specifications and manufacturer instructions for proper installation and gapping procedures.