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

File-fit rings mean you need to manually file the ends of the rings to achieve the correct gap for your engine's cylinder bore. This allows for a precise fit, especially in engines that have been bored out.

What is the significance of the '+.005in' sizing?

The '+.005in' indicates that these rings are designed for cylinders that have been bored out by 0.005 inches larger than their original factory size. This is common during engine rebuilding or modification.

Why are these rings considered 'low tension'?

Low tension rings are designed to exert less pressure against the cylinder wall. This can help reduce internal engine friction, potentially leading to improved efficiency and performance, while still maintaining a good seal.

Mahle Piston Ring Set 4160ML-043 - File Fit

Name: Mahle MS 4.155in+.005in .043in .043in 3.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-155in-005in-043in-043in-3-0mm-file-fit-rings-t14-29713
Price: 192.78 USD
Availability: BackOrder

Mahle MS 4.155in+.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 file fit piston ring set. Features .043in, .043in, 3.0mm rings and a +.005in size.

Key Features

This is a Mahle piston ring set.
The rings are file-fit, allowing for custom end gap adjustment.
Includes .043 inch top and second rings.
Features a 3.0mm oil control ring.
This set is sized +.005 inches larger than standard bore.
Designed for low tension operation to reduce friction.

⚠️ 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

These Mahle file-fit piston rings are built with a specific +.005 inch sizing, meaning they're intended for engines that have been bored out slightly beyond their original specification. The rings themselves measure .043 inches for the top and second rings, with a 3.0mm ring for the oil control. This combination is designed for low tension, which can help reduce friction and improve oil control in certain engine builds. File-fit rings give you the flexibility to precisely set the end gap yourself, ensuring a perfect seal for your specific cylinder bore. This is a common choice when rebuilding an engine where the cylinders have been honed to a larger diameter.

Mahle is a well-known name in engine components, and this set reflects their focus on precise engine parts. The file-fit design means you'll need to carefully measure and file the end gap to match your engine's bore size before installation. This allows for a custom fit that stock, pre-gapped rings might not achieve, especially in modified or rebuilt engines. It's a solid option for builders who want to dial in their engine's sealing performance.