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

File fit rings are designed so you can manually adjust the end gap to precisely match your cylinder bore and piston groove. This allows for a custom fit, which is important for optimal sealing and performance, especially in performance or custom engine builds.

How many cylinders does one set cover?

This Mahle ring set is intended for a single cylinder. If your engine has multiple cylinders, you will need to purchase one set for each cylinder.

Are these rings CARB approved?

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

Mahle Piston Ring Set 4.155in +.005in 4160MS-112-1

Name: Mahle MS 4.155in +.005in 1.0mm 1.0mm 2.0mm File Fit Ring - Single
Brand: Mahle
SKU: mahle-mahle-ms-4-155in-005in-1-0mm-1-0mm-2-0mm-file-fit-ring-single-t14-752829
Price: 32.15 USD
Availability: BackOrder

Mahle MS 4.155in +.005in 1.0mm 1.0mm 2.0mm File Fit Ring - Single

$32.15

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle file fit piston ring set for single cylinder engines. +.005in oversized for engine rebuilds.

Key Features

Fits universal applications for single cylinder engines.
Piston ring set measures 4.155 inches in diameter.
Includes a +.005 inch oversize to accommodate engine bore specifications.
Features a 1.0mm top ring, 1.0mm second ring, and 2.0mm oil control ring.
Designed as file fit rings, allowing for custom gap adjustment.
Standard tension rings for reliable 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

When you're rebuilding the top end of a single cylinder engine, getting the piston ring fit just right is crucial for proper sealing and compression. This Mahle file fit ring set is designed for that precise setup. The rings come in a 4.155 inch diameter, with a +.005 inch oversize to account for bore wear or honing. You'll get a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring, all standard tension.

Mahle is a well-known name in engine components, and these rings are made to be filed to your specific piston groove clearance. This allows for a custom fit that helps ensure a good seal against the cylinder wall. Having the correct ring gap is important for preventing blow-by and maintaining good oil control, which ultimately affects engine performance and longevity.

Remember that these rings are sold for a single cylinder. If you're working on a multi-cylinder engine, you'll need to order the appropriate number of sets. Also, please note these are not CARB approved and cannot be shipped to California.