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

File-fit rings have ends that are not pre-gapped. This means you will need to carefully measure and file down the ends of the compression rings to achieve the exact ring gap specified for your engine. This allows for a more precise fit and seal.

What are the different ring widths for?

The set includes two 1.0mm rings, which are typically the compression rings, and one 2.0mm ring, commonly used as the oil control ring. This specific sizing is designed to work with a variety of piston and cylinder configurations.

Can these rings be shipped to California?

No, these Mahle piston rings are not CARB approved and cannot be shipped to California. Please check local regulations for engine component compliance.

Mahle Piston Ring Set 4.055in +.005in 4060MS-112

Name: Mahle MS 4.055in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-055in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings-t14-29774
Price: 183.28 USD
Availability: BackOrder

Mahle MS 4.055in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

$183.28

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 4.055in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings. These file-fit rings allow for precise gap setting during installation.

Key Features

Fits a 4.055 inch cylinder bore.
Includes a +.005 inch oversize allowance for custom gap setting.
Features two 1.0mm compression rings and one 2.0mm oil control ring.
File-fit design allows for precise adjustment of the ring gap.
Designed for universal engine applications where custom fitment is needed.
Not approved for sale in California due to CARB regulations.

These are universal fit piston rings designed for a 4.055 inch bore. Always consult your vehicle's service manual to confirm compatibility with your specific engine build.

⚠️ 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 MS file-fit piston rings are designed for a 4.055-inch bore and come with a +.005-inch oversize allowance, giving you the flexibility to precisely set the ring gap during your engine rebuild. The set includes three rings with specific face widths: two 1.0mm rings and one 2.0mm ring, which is typical for the oil control ring in many engine configurations. This setup is crucial for ensuring a proper seal between the piston and cylinder wall, which directly impacts engine performance and oil consumption.

Mahle is a well-known name in engine components, and this ring set reflects their focus on providing parts that allow for accurate installation. The file-fit design means you'll need to carefully measure and file the ends of the compression rings to achieve the exact gap specified for your engine's application. This level of adjustability is often preferred in performance builds or when working with custom piston and cylinder combinations where standard-fit rings might not provide the ideal clearance. Proper installation of these rings is key to achieving optimal compression and preventing blow-by.

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