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

File fit rings require you to carefully file the ends of each ring to achieve the exact end gap specified for your engine's bore. This allows for precise control over clearances, which is important for performance builds.

What do the ring dimensions (1.0mm, 1.0mm, 2.0mm) refer to?

These dimensions refer to the height of the top ring (1.0mm), the second ring (1.0mm), and the oil control ring (2.0mm). This is a common configuration for many performance and custom engine builds.

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 4.270in +.005in 4275MS-112

Name: Mahle MS 4.270in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-270in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings-t14-29748
Price: 257.48 USD
Availability: BackOrder

Mahle MS 4.270in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

$257.48

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 4.270in +.005in piston ring set. File fit design for custom applications.

Key Features

Fits universal applications requiring custom ring gap setting.
Features a 1.0mm top ring, 1.0mm second ring, and 2.0mm oil control ring.
File-fit design allows for precise end gap adjustment during installation.
The +.005in sizing is for engines that have been bored out or require specific clearances.
Standard tension rings are suitable for many performance and custom builds.
Mahle is a well-known manufacturer of engine components.

These are universal fitment piston rings designed for custom engine builds. They are not specific to any particular year, make, or model of vehicle.

⚠️ 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

Mahle is a well-known name in engine components, particularly for their piston rings that are often found in both OE and performance applications. This specific set, the MS 4.270in +.005in file fit rings, is designed for builders who need precise control over ring end gap. The file-fit design means you'll need to carefully file the ends of each ring to achieve the exact clearance required for your engine build, which is common in performance or custom engine work.

This set features a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring. The +.005in designation indicates these rings are slightly oversized, intended to be honed to a precise bore size. This level of customization is crucial for optimizing compression and oil control in engines that have been bored out or are being built to specific tolerances. The standard tension is suitable for a wide range of applications where extreme boost pressures aren't the primary concern.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. If you're rebuilding an engine and need the flexibility to set your own ring end gap for optimal performance, this Mahle set is a solid option.