What does 'file fit' mean for piston rings?

File fit rings are designed so you can carefully file down the end gap to achieve the precise clearance required for your engine's cylinder bore. This allows for custom tuning of the ring seal.

What are the dimensions of these Mahle rings?

The top and second rings are 1/16 inch, and the oil ring is 3/16 inch. They are also +.005 inch oversized for bores larger than standard.

Can these rings be shipped to California?

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

Mahle Piston Ring Set 4445MS - File Fit

Name: Mahle MS 4.440in+ .005in 1/16in 1/16in 3/16in File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-440in-005in-1-16in-1-16in-3-16in-file-fit-rings-t14-29626
Price: 118.05 USD
Availability: BackOrder

Mahle MS 4.440in+ .005in 1/16in 1/16in 3/16in File Fit Rings

$118.05

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 4.440in+ .005in file fit piston ring set. For engine rebuilds needing precise ring gap adjustment.

Key Features

This is a Mahle MS piston ring set.
The top and second rings are 1/16 inch wide.
The oil control ring is 3/16 inch wide.
These rings are +.005 inch oversized for larger bores.
They are file-fit, meaning you adjust the end gap yourself.
Universal fitment for various engine applications.

⚠️ 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

When you're rebuilding an engine and need to get the piston ring end gap just right, a file-fit ring set like this Mahle MS set is what you'll want. These rings are designed so you can carefully file them down to achieve the exact clearance needed for your specific cylinder bore and engine build. This level of precision is crucial for proper sealing, preventing blow-by, and ensuring your engine runs efficiently and lasts.

Mahle is a well-known name in engine components, and this set is made to their standards. The rings measure 1/16 inch for the top and second rings, and 3/16 inch for the oil ring. They are also +.005 inch oversized, meaning they are intended for a cylinder bore that's slightly larger than standard, and they come ready for you to file them to your exact specification. This is a common step for performance builds or when re-boring cylinders to a specific size.

Keep in mind that these rings are not CARB approved, so they cannot be shipped to California. Always refer to your engine's service manual for the correct ring gap specifications and installation procedures.