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

File fit rings are designed so you can manually adjust the end gap to perfectly match your cylinder bore. This allows for a more precise fit than standard rings, which is important for engine performance and sealing.

What is the advantage of a .005 inch oversize ring?

The .005 inch oversize means the rings are slightly larger than standard. This gives you more material to work with when filing the end gap, allowing for a more accurate and custom fit for your specific engine build.

What is the difference between the .043in and 3.0mm rings?

The .043 inch rings are typically for the top and second compression ring positions, while the 3.0mm ring is often used for the oil control ring. This set provides the common sizes needed for many engine rebuilds.

Mahle File Fit Piston Rings MS 4.185in+.005in 4190ML-043

Name: Mahle MS 4.185in+.005in .043in .043in 3.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-185in-005in-043in-043in-3-0mm-file-fit-rings-t14-29719
Price: 192.78 USD
Availability: BackOrder

Mahle MS 4.185in+.005in .043in .043in 3.0mm File Fit Rings

$192.78

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 4.185in+.005in .043in .043in 3.0mm File Fit Rings. These file-fit rings are for engine rebuilds needing precise piston ring gap adjustments.

Key Features

This is a universal fit piston ring set.
Features a .005 inch oversize for custom fitting.
Includes two .043 inch rings and one 3.0mm ring.
Low tension design can help reduce friction.
File-fit design allows for precise end gap adjustment.
Not CARB approved; cannot ship to California.

⚠️ 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 get the piston ring end gap just right, Mahle's file-fit rings are a solid choice. This set is designed for builders who need to precisely set the gap to match their specific cylinder bore and application. The file-fit design means you'll be doing a bit of custom work to achieve the perfect clearance, which is crucial for proper sealing and engine performance.

This particular set features rings with a .005 inch oversize, meaning they are slightly larger than standard and intended to be filed down to your exact specification. You get two .043 inch rings and one 3.0mm ring, covering the common configurations for many engines. Mahle is a well-known name in engine components, and these rings are made to meet the demands of an engine rebuild. They are a low-tension design, which can help reduce friction and improve efficiency when installed correctly.

Remember, file-fit rings require careful measurement and filing to achieve the correct end gap. It's a step that separates a good rebuild from a great one. Make sure you have the right tools and a clean workspace before you start fitting these rings to your pistons.