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

File-fit rings have an end gap that you can adjust yourself using a ring filer tool. This allows you to precisely set the gap to match your specific cylinder bore size, which is important for proper sealing and engine performance.

What are the dimensions of these rings?

This set includes a 1.5mm top ring, a 1.5mm second ring, and a 3.0mm oil control ring. They are designed for a cylinder bore of 4.020 inches plus an additional 0.005 inches.

Are these rings suitable for all engine rebuilds?

These are file-fit rings, meaning they require custom gapping for your specific cylinder bore. They are not a direct fit out of the box and are best suited for engine builders who can properly measure and file the ring end gaps.

Mahle Piston Rings MS 4.020in+ .005in 1.5 1.5 3.0 mm File Fi

Name: Mahle MS 4.020in+ .005in 1.5 1.5 3.0 mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-020in-005in-1-5-1-5-3-0-mm-file-fit-rings-t14-29783
Price: 158.86 USD
Availability: BackOrder

Mahle MS 4.020in+ .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 MS 4.020in+ .005in 1.5 1.5 3.0 mm File Fit Rings. For engine rebuilds, these file-fit rings ensure a proper seal.

Key Features

This is a universal piston ring set.
Features a 1.5mm top ring, 1.5mm second ring, and 3.0mm oil control ring.
Designed with a file-fit end gap for custom sizing.
Intended for cylinders bored to 4.020 inches plus 0.005 inches.
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

When you're rebuilding the top end of your engine, getting the piston rings seated correctly is crucial for performance and longevity. These file-fit rings from Mahle are designed for that precise job. The file-fit design means you can adjust the end gap yourself, which is essential for achieving the right seal in your cylinders, especially if you've had them bored out to 4.020 inches plus an additional 0.005 inches. This set features a 1.5mm top ring, a 1.5mm second ring, and a 3.0mm oil control ring, a common configuration for many performance and heavy-duty applications.

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 nature of these rings allows for a custom fit to your specific cylinder bore, which is important for controlling oil consumption and ensuring good compression. This is a solid option if you're looking for a reliable set of rings for a performance build or a thorough engine overhaul where precise ring gap is a priority.