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

File fit rings are designed so you can manually adjust the end gap to perfectly match your engine's cylinder bore. This allows for a more precise fit than pre-gapped rings, which is important for engine performance and sealing.

What is the advantage of low-tension rings?

Low-tension rings generally create less drag against the cylinder wall, which can lead to improved fuel economy and reduced friction. They are also often designed for better oil control.

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 4045ML - File Fit

Name: Mahle MS 4.040in+ .005in 1/16in 1/16in 3/16in File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-040in-005in-1-16in-1-16in-3-16in-file-fit-rings-t14-29636
Price: 118.05 USD
Availability: BackOrder

Mahle MS 4.040in+ .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 4.040in+ .005in 1/16in 1/16in 3/16in File Fit Rings. This ring set is designed for engine rebuilds needing precise ring gap adjustment.

Key Features

This set includes low-tension piston rings.
Top two rings measure 1/16 inch wide.
Oil ring measures 3/16 inch wide.
Rings are file-fit, requiring custom end gap adjustment.
The set is 4.040 inches plus 0.005 inches oversize.
Designed for engine rebuilds where precise ring gap is critical.

⚠️ 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 low-tension piston rings with specific dimensions: 1/16 inch for the top two rings and 3/16 inch for the oil ring. These are file-fit rings, meaning you'll need to adjust the end gap yourself to match your engine's bore size precisely. This is a common step when rebuilding an engine to ensure optimal sealing and performance.

The rings are sized at 4.040 inches plus an additional 0.005 inches, offering a slight oversize for worn bores or to achieve a specific fit. Low-tension rings are often chosen for improved oil control and reduced friction, which can lead to better fuel economy and a smoother running engine. Mahle is a well-known name in engine components, and this set is built for those who are doing a detailed engine rebuild and want to control the ring gap themselves.

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