Mahle MS 4.060in+.005in .043in .043in 3.0mm File Fit Rings

If you're rebuilding the top end of your engine and need to get the cylinders sealed up right, a good set of piston rings is crucial. This set from Mahle is designed for a 4.060 inch bore, and they're file-fit, meaning you can precisely adjust the gap to match your specific engine build. This is especially important for performance applications or engines with modified heads where precise control over combustion is key.

Mahle is a well-known name in engine components, and this ring set reflects that. The rings are a low-tension design, which can help reduce friction and improve efficiency. The set includes the specific sizes you'll need: the top ring is .043 inches, the second ring is also .043 inches, and the oil ring is 3.0mm. Since these are file-fit, you'll need to carefully measure and file the end gap on the top ring to achieve the correct clearance for your cylinder walls. This allows for a more custom fit than standard pre-gapped rings.

Remember, these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's service manual for the correct installation procedures and specifications when fitting piston rings.