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

File-fit rings mean the ends of the top ring are not pre-gapped. You will need to carefully measure and file the ring ends to achieve the correct gap for your specific cylinder bore size. This allows for a custom fit.

What is the purpose of the different ring sizes (1.0mm, 1.0mm, 2.0mm)?

The different sizes refer to the thickness of the rings. The top ring (1.0mm) and second ring (1.0mm) seal the combustion chamber, while the oil ring (2.0mm) scrapes excess oil from the cylinder walls. This specific configuration is common for many engine builds.

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 Ring Set 4265MS-112 - File Fit

Name: Mahle MS 4.260in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-260in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings-t14-29746
Price: 257.48 USD
Availability: BackOrder

Mahle MS 4.260in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

$257.48

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle MS 4.260in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings. These file-fit rings are designed for custom engine builds.

Key Features

Fits universal applications.
Ring set includes 1.0mm top ring, 1.0mm second ring, and 2.0mm oil ring.
File-fit design allows for custom gap adjustment to match cylinder bore.
Oversize of +.005 inches for a 4.260 inch bore diameter.
Standard tension rings for reliable sealing.
Mahle is a popular brand for engine components.

⚠️ 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

These Mahle file-fit piston rings are precisely sized at 4.260 inches with a +.005 inch oversize. The ring set features a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil ring, offering a standard tension setup suitable for many engine rebuilds. File-fit rings give you the flexibility to achieve a perfect gap for your specific cylinder bore, which is crucial for optimal sealing and engine performance, especially in modified or custom applications.

Mahle is a well-known name in engine components, and this ring set reflects their commitment to well-built parts. The file-fit design means you'll need to carefully measure and file the ends of the top ring to achieve the correct piston-to-wall clearance for your engine. This process ensures a tight seal against the cylinder wall, helping to prevent blow-by and maintain compression. The combination of precise sizing and the ability to fine-tune the gap makes these rings a solid option for engine builders looking for reliable performance.

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