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

File fit rings require you to carefully file the end gap of the top ring during installation. This allows you to precisely set the clearance to match your specific cylinder bore size and engine build requirements, ensuring a better seal.

What are the specific dimensions of the rings in this set?

This set includes rings with a 4.135-inch bore size. The top ring is 0.043 inches, the second ring is 1.5mm, and the oil control ring is 3.0mm.

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 4.135in+.005in 4140MS-1115

Name: Mahle MS 4.135in+.005in .043in 1.5mm 3.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-135in-005in-043in-1-5mm-3-0mm-file-fit-rings-t14-29722
Price: 189.56 USD
Availability: BackOrder

Mahle MS 4.135in+.005in .043in 1.5mm 3.0mm File Fit Rings

$189.56

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 4.135in+.005in .043in 1.5mm 3.0mm File Fit Rings Ring Set

Key Features

This is a Mahle file fit piston ring set.
The bore size for this set is 4.135 inches.
The ring dimensions are 0.043 inches, 1.5mm, and 3.0mm.
These are standard tension rings.
The top ring is file fit, meaning the end gap must be adjusted during installation.
Not CARB approved and 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

If you're rebuilding the top end of your engine and need to ensure a proper seal between the piston and cylinder wall, this Mahle file fit ring set is a solid option. These rings are designed to be precisely fitted to your cylinder bore during installation, allowing for a custom seal that can improve compression and reduce oil consumption. The set includes rings with a 4.135-inch bore size, and the specific ring dimensions are 0.043 inches for the top ring, 1.5mm for the second ring, and 3.0mm for the oil control ring.

Mahle is a well-known name in engine components, and these file fit rings are built to meet the demands of a performance rebuild. The file fit design means you'll need to carefully file the end gap of the top ring to achieve the exact clearance specified in your engine's service manual. This level of adjustability is crucial for engines that have been bored out or modified, as it allows for a perfect match to the cylinder wall. This set is a popular choice for mechanics who want to achieve optimal performance from a rebuilt engine.