Mahle MS 4.250in+ .005in 1/16in 1/16in 3/16in 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 offerings, like this set of file-fit piston rings. These rings are designed for engine builders who need to precisely control the ring gap for their specific application, especially in performance or custom engine builds. The standard tension design is suitable for a wide range of engine types.

This set features a 1/16 inch top ring, a 1/16 inch second ring, and a 3/16 inch oil ring. They are file-fit, meaning you'll need to adjust the end gap yourself to match your cylinder bore dimensions. This allows for a more accurate seal, which is crucial for optimal compression and oil control. The rings are also +.005 inches oversized, intended for use with a 4.250 inch bore that has been honed to match. This is a common practice when rebuilding or modifying engines to achieve a perfect fit and performance.