Mahle MS 4.375in+ .005in 1/16in 1/16in 3/16in File Fit Rings

This Mahle piston ring set includes low tension, file-fit rings designed for a 4.375 inch bore with a +.005 inch oversize. The ring groove dimensions are 1/16 inch for the top and second rings, and 3/16 inch for the oil ring. These rings are intended for builders who need to precisely fit the ring end gaps to their specific engine build.

File-fit rings offer a unique advantage for engine builders. Because the end gaps are not pre-set, you can carefully file them down to the exact clearance needed for your engine's bore and intended use. This level of customization helps ensure optimal sealing and performance, especially in modified or high-performance applications. Mahle is a well-known name in engine components, and this set reflects their focus on providing parts for serious engine work.

Please note 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 ring gap specifications.