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

File-fit rings require you to manually adjust the end gap by filing them down to match the specific clearance needed for your engine's cylinder bore. This allows for a precise, custom fit.

Are these rings suitable for all engines?

These are universal fit rings designed for builders who need to precisely set the ring gap. They are 0.005 inches oversized. Always consult your engine's service manual to ensure they are appropriate for your specific application and bore size.

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 4135ML-043 - File Fit

Name: Mahle MS 4.130in+.005in .043in .043in 3.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-130in-005in-043in-043in-3-0mm-file-fit-rings-t14-29708
Price: 189.00 USD
Availability: BackOrder

Mahle MS 4.130in+.005in .043in .043in 3.0mm File Fit Rings

$189.00

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 4.130in+.005in .043in .043in 3.0mm File Fit Rings. These file-fit rings allow for precise gap adjustment during installation.

Key Features

This is a universal fit piston ring set.
The top and second rings measure .043 inches, and the oil ring measures 3.0mm.
These rings are file-fit, meaning the end gap must be adjusted by the installer.
The set is 0.005 inches oversized for the bore.
Low tension ring design can help 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 precisely 0.005 inches oversized, measuring .043 inches for the top and second rings, and 3.0mm for the oil ring. This specific sizing and file-fit design means you'll need to carefully file the end gap of each ring to achieve the exact clearance required for your engine's bore. This level of customization is crucial for optimal sealing and performance, especially in performance or rebuilt engines where precise tolerances are key.

Mahle is a well-known name in engine components, and this set reflects their focus on providing parts that allow for a tailored installation. The low-tension design of these rings can also contribute to reduced friction, which is always a good thing for engine efficiency and power. Because they are file-fit, they offer a unique advantage for builders who want to dial in their engine's ring seal perfectly.

Remember, these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for the correct ring gap specifications and installation procedures.