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

File fit rings require you to carefully measure and file the end gap to the correct specification for your engine's cylinder bore. This allows for precise clearance adjustments, which is important for proper sealing and engine performance.

What are the dimensions of these piston rings?

This set includes a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring. They are sized at 4.170 inches and are +.005 inches over the standard size.

Are these rings CARB approved?

No, these rings are not CARB approved and cannot be shipped to California.

Mahle Piston Rings MS 4.170in +.005in 4175MS-112

Name: Mahle MS 4.170in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-170in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings-t14-29740
Price: 202.98 USD
Availability: BackOrder

Mahle MS 4.170in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

$202.98

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 4.170in +.005in file fit piston ring set. Part# 4175MS-112. Universal fit. Not CARB approved.

Key Features

This is a universal fit piston ring set from Mahle.
The set includes a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring.
These are file fit rings, meaning the end gap must be precisely set by the installer.
The rings are sized at 4.170 inches with a +.005 inch overbore specification.
Mahle is a recognized 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

This is a set of Mahle MS 4.170 inch file fit piston rings. These rings are designed for engines where the piston ring end gap needs to be precisely set to match the cylinder bore. The set includes rings with a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring, all with a +.005 inch sizing for a specific bore range. File fit rings are a popular choice when rebuilding an engine, especially for performance applications or when working with custom bore sizes, as they allow for exact clearance adjustments.

Mahle is a well-known name in engine components, and this ring set reflects their focus on engine building essentials. The file fit design means you'll need to carefully measure and file the end gap to achieve the correct clearance for your specific engine build. This process is crucial for proper sealing, preventing blow-by, and ensuring optimal performance and longevity. While these are universal fit rings, they are intended for engine builds where precise ring gap setting is a priority.