Mahle MS 4.140in+.005in .043in 1.5mm 3.0mm File Fit Rings

When you're rebuilding an engine and need to get the piston ring end gap just right, a file-fit set like this Mahle MS series is what you'll reach for. These rings are designed to be filed down to achieve the exact clearance needed for your specific bore and application, which is crucial for proper sealing and oil control. This set features a 0.043 inch top ring, a 1.5mm second ring, and a 3.0mm oil control ring, all with standard tension. They are also +.005 inch oversized, meaning they are intended for bores that have been honed or bored out by 0.005 inches.

Mahle is a well-known name in engine components, and this ring set reflects that reputation. The file-fit design gives you the ultimate control over your engine's compression and oil consumption. Getting the end gap correct is key to preventing blow-by and oil burning, especially in performance or high-stress applications. Remember that these rings are not CARB approved and cannot be shipped to California.