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

File-fit rings have an end gap that you adjust yourself by filing them down to the correct size for your cylinder bore. This allows for precise control over the ring gap, which is important for sealing and performance, especially in custom or performance engine builds.

What are the dimensions of these rings?

This set features 1.5mm for the top compression ring, 1.5mm for the second compression ring, and a 3.0mm oil control ring. They are also sized +.005 inches larger than standard to allow for filing.

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 .005in File Fit 4145MS-15

Name: Mahle MS 4.140in+ .005in 1.5 1.5 3.0 mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-140in-005in-1-5-1-5-3-0-mm-file-fit-rings-t14-29797
Price: 158.86 USD
Availability: BackOrder

Mahle MS 4.140in+ .005in 1.5 1.5 3.0 mm File Fit Rings

$158.86

On Backorder

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

Mahle .005in file fit piston ring set. Universal fitment for engine rebuilds.

Key Features

Fits Universal applications.
Ring set dimensions: 1.5mm, 1.5mm, 3.0mm.
+.005 inch file-fit design for adjustable ring gap.
Standard tension rings.
Not CARB approved; cannot ship to California.

These rings are listed as universal fitment. Always check manufacturer specifications 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

This is a set of Mahle file-fit piston rings, sized at +.005 inches for an engine rebuild. The ring dimensions are 1.5mm for the top two rings and 3.0mm for the oil control ring. File-fit rings allow for precise gap adjustment during installation, which is crucial for optimal sealing and performance, especially in modified or performance engines where clearances might differ from stock.

Mahle is a well-known name in engine components, and these rings are built to meet the demands of an engine rebuild. The file-fit design means you'll need to carefully measure and file the end gap on each ring to match your specific cylinder bore. This process ensures a tight seal against combustion pressures and helps prevent oil from entering the combustion chamber. This set is designed for standard tension applications.

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