What is the benefit of a moly coating on piston rings?

Moly coatings are known for reducing friction between the piston ring and the cylinder wall. This helps improve wear resistance and can lead to a better seal, especially under high heat conditions common in performance engines.

What does the '5/64in' refer to on these rings?

The '5/64in' specifies the width of the piston ring itself. This is a common dimension for top compression rings in many engine builds, but it's important to match it to your piston's groove specification.

Why can't these rings be shipped to California?

These piston rings are not CARB (California Air Resources Board) approved. This means they do not meet California's emissions standards for aftermarket engine parts, so they cannot be legally sold or shipped into the state.

Mahle OE Piston Rings 3010860B - 4.2900in Moly

Name: Mahle Rings 4.2900in X 5/64in Moly Claimer Top Compression Ring Moly Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-4-2900in-x-5-64in-moly-claimer-top-compression-ring-moly-ri-t14-51193
Price: 465.40 USD
Availability: BackOrder

Mahle Rings 4.2900in X 5/64in Moly Claimer Top Compression Ring Moly Ring Set (48 Qty Bulk Pack)

$465.40

On Backorder

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

Mahle OE Moly Claimer top compression rings. 4.2900in bore size, 5/64in width. Bulk pack of 48 rings. Not CARB approved.

Key Features

Fits a 4.2900-inch cylinder bore.
Features a 5/64-inch ring width.
Moly face coating offers improved wear resistance and reduced friction.
Bulk pack includes 48 top compression rings.
Not CARB approved; cannot ship to California.

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Product Details

Mahle is well-known for making solid engine components, and these Moly Claimer top compression rings are a great example of their work. If you're rebuilding an engine and need a bulk pack of high-performance rings, this set is designed to handle the demands of serious work. They feature a moly face coating, which is a popular choice for its ability to reduce friction and improve wear resistance, especially in high-heat situations.

This particular set is built for a 4.2900-inch bore and features a 5/64-inch ring width, a common size for many performance and heavy-duty applications. The moly coating helps the rings seat quickly and maintain a good seal against the cylinder wall, which is crucial for compression and oil control. Because these are a bulk pack of 48 rings, they are ideal for shops or builders working on multiple engines or larger displacement builds where you need a good supply on hand.

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 installation procedures and recommended ring gap settings.