Mahle MS 3.640in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

This set includes Mahle MS piston rings, specifically sized at 3.640 inches with a +.005 inch oversize. You get a ring set featuring 1.0mm for the top ring, 1.0mm for the second ring, and 2.0mm for the oil control ring. These are file-fit rings, meaning they are designed to be precisely gapped by the installer to achieve the perfect fit for your specific engine build.

Mahle is a well-known name in engine components, and this set is built for those who need to dial in their engine's performance. The file-fit design is common in performance and custom engine applications where standard ring sets might not offer the exact clearance needed. This allows for improved sealing and better control over combustion, especially when dealing with modified engines or specific bore dimensions that fall just outside standard sizes.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Proper installation requires careful measurement and filing to set the correct end gap for your application.