What does 'file fit' mean for these piston rings?

File fit rings require you to manually adjust the end gap to match your specific piston and cylinder bore. This allows for a more precise fit, which is common in performance or custom engine builds.

What are the actual ring sizes included in this set?

This set includes a 0.043 inch oil ring, a 1.5mm second ring, and a 3.0mm top ring. The bore size is 4.125 inches with a +.005 inch oversize.

Can these rings be shipped to California?

No, these rings are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle Piston Rings MS 4.125in+.005in 4130MS-1115

Name: Mahle MS 4.125in+.005in .043in 1.5mm 3.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-125in-005in-043in-1-5mm-3-0mm-file-fit-rings-t14-29720
Price: 189.56 USD
Availability: InStock

Mahle MS 4.125in+.005in .043in 1.5mm 3.0mm File Fit Rings

$189.56

Only 1 left in stock

Mahle MS file fit piston ring set for 4.125in bore engines. Includes 0.043in, 1.5mm, and 3.0mm ring sizes for a precise fit.

Key Features

This is a Mahle MS file fit piston ring set.
Designed for a 4.125 inch bore with a +.005 inch oversize.
Includes a 0.043 inch oil ring, a 1.5mm second ring, and a 3.0mm top ring.
File fit design allows for custom gapping to match specific engine builds.
Suitable for engine rebuilding projects where precise ring sealing is important.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

When you're rebuilding the top end of an engine, getting the right piston rings is crucial for proper sealing and performance. These Mahle MS file fit rings are designed for a 4.125 inch bore, with a +.005 inch oversize to account for any slight variations or honing. The set includes a 0.043 inch oil ring, a 1.5mm second ring, and a 3.0mm top ring, giving you the flexibility to achieve a perfect fit during installation.

Mahle is a well-known name in engine components, and this ring set reflects their commitment to reliable parts. The file fit design means you'll need to gap the rings yourself to match your specific piston and cylinder wall clearance, a common practice for performance builds or when working with custom setups. This ensures optimal compression sealing and oil control, which is key to a healthy engine.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's service manual for proper installation procedures and ring gapping specifications.