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

File-fit rings mean you need to adjust the end gap yourself during installation. This allows for precise fitting to your specific cylinder bore and piston combination, which is important for proper sealing and engine performance.

What are the dimensions of these piston rings?

The top and second rings are .043 inches thick, and the oil ring is 3.0mm thick. They are also sized at +.005 inches, indicating a specific bore clearance.

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 Ring Set 3791MS-043

Name: Mahle MS 3.791in+.005in .043 .043 3.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-3-791in-005in-043-043-3-0mm-file-fit-rings-t14-29817
Price: 192.78 USD
Availability: BackOrder

Mahle MS 3.791in+.005in .043 .043 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 3.791in+.005in .043 .043 3.0mm File Fit Ring Set. This set includes file-fit piston rings for engine rebuilding.

Key Features

This product is a ring set.
The top and second rings are .043 inches thick.
The oil ring is 3.0mm thick.
These are file-fit rings, requiring end gap adjustment during installation.
The rings are +.005 inch, indicating a specific sizing for bore clearance.
This is a low-tension ring set.

⚠️ 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

This Mahle ring set includes file-fit piston rings designed for engine rebuilding. The rings measure .043 inches for the top and second rings, with a 3.0mm oil ring. They are also specified as +.005 inch, indicating they are sized for a specific bore clearance, and are designed to be file-fit, meaning you'll adjust the end gap yourself during installation to achieve the correct fit for your pistons and cylinders.

Mahle is a well-known name in engine components, and this set is built to meet the demands of an engine rebuild. The low-tension design can help reduce friction and improve oil control in certain applications. Because these are file-fit rings, they offer a degree of adjustability that can be crucial for achieving optimal sealing and performance, especially when working with custom piston and cylinder combinations or when precise end gap control is needed.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Proper installation is key, and file-fit rings require careful measurement and adjustment of the end gap to match your specific engine build. Always refer to your engine's service manual or a trusted build guide for the correct procedure.