Mahle MS 4.130in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

Mahle is well-known for making solid engine components, and these file-fit piston rings are a great example of their work for custom engine builds. These rings are designed to be filed to the exact gap needed for your specific engine, giving you more control over your build. The set includes rings with a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil ring, all with standard tension.

These rings are sized at 4.130 inches with an additional 0.005 inches for adjustment, and they are specifically designed to be 'file fit.' This means you'll need to carefully file the ends of the top and second rings to achieve the correct piston-to-wall clearance for your engine's bore. This process is crucial for optimal performance and sealing, especially in modified or performance engines where precise tolerances are key. Mahle's reputation for well-built parts means you can trust these rings to perform when properly installed.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper filing and fitting procedures to ensure the best results for your engine.