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

File fit rings are designed so you can precisely set the gap yourself by filing the ends. This allows for a custom fit tailored to your engine's bore size and operating conditions, which is important for performance builds.

What are the dimensions of the rings in this set?

This set includes a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil ring. The overall bore size they are intended for is 3.810 inches, with an additional 0.005 inch clearance.

Are these rings CARB approved?

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

Mahle Piston Ring Set 3815MS-112 - File Fit

Name: Mahle MS 3.810in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-3-810in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings-t14-29759
Price: 183.28 USD
Availability: BackOrder

Mahle MS 3.810in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

$183.28

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 3.810in +.005in 1.0mm 1.0mm 2.0mm file fit ring set.

Key Features

This is a universal fit piston ring set.
The top ring measures 1.0mm, the second ring is 1.0mm, and the oil ring is 2.0mm.
Rings are sized at 3.810 inches with an additional 0.005 inch clearance.
This set is designed for a file-fit application, allowing for custom gap setting.
Features standard tension for consistent performance.

⚠️ 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 MS piston rings are precisely sized at 3.810 inches with an additional 0.005 inch clearance, designed for a file-fit application. The ring set features a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil ring, offering a standard tension setup for your engine rebuild. File-fit rings give you the flexibility to precisely set the ring gap yourself, which is crucial for optimal sealing and performance in many performance or custom engine builds. This allows you to tailor the gap to your specific engine's bore and operating conditions, ensuring better compression and oil control.

Mahle is a well-known name in engine components, and this ring set reflects their focus on providing parts that meet specific engine building needs. The combination of precise sizing and the file-fit design means these rings are intended for builders who want to achieve a custom fit for their engine. Proper installation of file-fit rings is key; it requires careful measurement and filing to achieve the correct gap before installation into the piston grooves.