What is the purpose of the plasma-moly coating on these rings?

The plasma-moly coating is an advanced surface treatment that helps reduce friction between the piston ring and the cylinder wall. This can lead to improved engine efficiency and a longer lifespan for both components, while also aiding in proper ring seating during engine break-in.

What does the 'RW Ring Set' designation mean?

The 'RW' designation typically refers to the specific type or profile of the ring, indicating it's designed for the top compression ring position. The dimensions provided (4.315in x .0625in x .190in) further specify its exact size and shape for this application.

Why are these rings not CARB approved?

Some engine components are not approved by the California Air Resources Board (CARB) for use in vehicles registered in California due to emissions regulations. As a result, this specific set cannot be shipped to California.

Mahle Plasma Moly Steel Top Piston Rings 3011113B

Name: Mahle Rings Plasma Moly Steel Top Comp Ring 4.315in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-plasma-moly-steel-top-comp-ring-4-315in-x-0625in-190in-rw-r-t14-47583
Price: 730.92 USD
Availability: BackOrder

Mahle Rings Plasma Moly Steel Top Comp Ring 4.315in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)

$730.92

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 Plasma Moly Steel Top Piston Ring Set. 4.315in bore, 0.0625in thick. Bulk pack of 48 rings. Part# 3011113B. Not CARB approved.

Key Features

This is a Mahle OE Plasma Moly Steel Top Compression Ring Set.
Each ring has a bore diameter of 4.315 inches and a thickness of 0.0625 inches.
The ring depth is 0.190 inches.
Constructed from plasma-moly steel for durability and heat resistance.
Features a plasma-moly coating to reduce friction and aid in break-in.
This is a bulk pack containing 48 rings.

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Product Details

These Mahle top compression rings are made from plasma-moly steel, a strong material chosen for its durability and ability to handle the heat and pressure found in performance engines. Each ring measures 4.315 inches in bore diameter and is 0.0625 inches thick, with a 0.190-inch ring depth. This specific design is intended for the top compression ring position, where it plays a crucial role in sealing the combustion chamber.

The plasma-moly coating on these rings is a notable feature. This advanced surface treatment helps reduce friction between the ring and the cylinder wall, which can lead to improved engine efficiency and a longer lifespan for both components. This coating also aids in the break-in process, helping the rings seat properly against the cylinder wall for a solid seal. This bulk pack contains 48 rings, making it a practical choice for engine builders working on multiple engines or for those who need a significant quantity for a large project.

When rebuilding or refreshing an engine, selecting the right piston rings is critical for proper sealing and performance. These Mahle rings are a well-built option for applications where a robust and reliable top compression ring is needed. Please note that these rings are not CARB approved and cannot be shipped to California.