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

File-fit rings are designed to be custom-sized by the installer. You use a specialized file to carefully reduce the end gap of each ring to match the specific clearance required for your engine's cylinder bore. This allows for a more precise seal than pre-gapped rings.

What are the ring dimensions for this set?

This set includes a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring. The bore size is 3.898 inches, and they are +.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 3.898in +.005in 1.0mm 1.0mm 2.0mm File

Name: Mahle MS 3.898in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-3-898in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings-t14-29762
Price: 183.28 USD
Availability: BackOrder

Mahle MS 3.898in +.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 3.898in +.005in 1.0mm 1.0mm 2.0mm file fit piston ring set. For engine rebuilds needing precise ring gap adjustment.

Key Features

This is a Mahle MS piston ring set.
Features 1.0mm top ring, 1.0mm second ring, and 2.0mm oil control ring.
Rings are file-fit, allowing for custom end gap adjustment.
Sized at 3.898 inches with a +.005 inch oversize.
Designed for engine rebuilds requiring precise ring gap settings.

⚠️ 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 an engine and need to set the piston ring end gap precisely, a file-fit ring set is the way to go. These Mahle MS rings are designed for this purpose, allowing you to custom-file each ring to achieve the perfect clearance for your specific cylinder bore. This is crucial for proper sealing, oil control, and overall engine performance, especially in modified or high-performance applications where standard rings might not offer the ideal gap.

This set features a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring. The rings are manufactured to Mahle's well-built standards, ensuring they can withstand the demands of an engine rebuild. The +.005in sizing indicates they are slightly larger than standard, giving you a bit more material to work with when filing for that exact fit. Remember, these are intended for experienced engine builders who understand the process of filing and fitting piston rings.

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 recommended ring gap specifications and installation procedures.