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 bore size of your engine cylinders. This allows for a more precise fit than pre-gapped rings.

What is the advantage of using +.005 inch oversized rings?

The +.005 inch sizing provides extra material on the ring ends. This is beneficial for file-fit rings, as it gives you more room to achieve the correct end gap for your specific cylinder bore dimensions.

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 Rings 4315MS-15 - File Fit Rings

Name: Mahle MS 4.310in+ .005in 1.5 1.5 3.0 mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-310in-005in-1-5-1-5-3-0-mm-file-fit-rings-t14-29805
Price: 179.36 USD
Availability: BackOrder

Mahle MS 4.310in+ .005in 1.5 1.5 3.0 mm File Fit Rings

$179.36

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 4.310in+ .005in 1.5 1.5 3.0 mm File Fit Rings. These file-fit rings are designed for custom engine builds.

Key Features

Fits Universal applications.
Ring set includes 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring.
Standard tension design for consistent performance.
File-fit design allows for custom end gap adjustment to match cylinder bore.
Rings are +.005 inches larger than standard bore size for adjustment.
Mahle is a trusted name in 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

Mahle is a well-known name in engine components, often supplying parts for original equipment manufacturers. This set of file-fit piston rings, part number 4315MS-15, is designed for builders who need precise control over ring end gap during engine assembly. The rings measure 1.5mm for the top and second rings, and 3.0mm for the oil ring, with a standard tension design.

These rings are file-fit, meaning you'll need to carefully file the end gap to match your specific cylinder bore dimensions. This allows for a custom fit that can improve sealing and performance in modified or rebuilt engines. The set includes rings that are 0.005 inches larger than the standard bore size, giving you material to work with for achieving the correct gap. This is a popular choice for engine rebuilders who want to ensure optimal compression and oil control.

Please note that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine build specifications and manufacturer's instructions for proper installation and gap setting.