What is the purpose of the plasma moly steel coating on the top ring?

The plasma moly steel coating on the top ring is designed to reduce friction and wear between the ring and the cylinder wall. This helps to ensure a longer lifespan for the rings and maintain optimal engine performance.

Are these rings suitable for all engine types with a 4.110-inch bore?

These rings are designed for engines with a 4.110-inch bore and specific ring groove dimensions (1.5mm top, .151-inch second). It's important to consult your engine's service manual to confirm compatibility with your specific piston and cylinder head design.

What does the 'RW' designation mean for the second ring?

The 'RW' designation typically refers to the shape or profile of the second ring, which is optimized for oil control. This specific profile helps to scrape excess oil from the cylinder walls during the piston's downstroke, preventing it from entering the combustion chamber.

Mahle OE Piston Rings 3010980B - 4.110in Bore

Name: Mahle Rings Plasma Moly Steel 1.5MM x .151 RW 4.110in Bore Diameter Moly Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-plasma-moly-steel-1-5mm-x-151-rw-4-110in-bore-diameter-moly-t14-47619
Price: 667.37 USD
Availability: BackOrder

Mahle Rings Plasma Moly Steel 1.5MM x .151 RW 4.110in Bore Diameter Moly Ring Set (48 Qty Bulk Pack)

$667.37

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 Piston Rings for 4.110in bore engines. Features plasma moly steel construction for durability. Bulk 48-pack.

Key Features

Fits engines with a 4.110-inch bore diameter.
Top ring measures 1.5mm with a plasma moly steel construction for improved wear resistance.
Second ring measures .151 inches and is designed for effective oil control.
Includes 48 sets of piston rings in a bulk pack.
Mahle OE is a well-known brand in engine components.
Not CARB approved; cannot ship to California.

These piston rings are designed for engines with a 4.110-inch bore diameter. Please verify compatibility with your specific engine build before purchase.

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Product Details

The plasma-moly steel construction on these Mahle piston rings is a key detail, especially for builds where durability and heat resistance are critical. These rings are designed for a 4.110-inch bore diameter, and the specific dimensions of 1.5mm for the top ring and .151 inches for the second ring (RW designation) are chosen to work with a variety of piston designs and engine applications. This bulk pack includes 48 sets, making it a solid choice for engine builders or shops working on multiple engines with this bore size.

Mahle has a long history in engine components, and these rings reflect that experience. The plasma-moly coating on the top ring is a well-known method for reducing friction and wear, which translates to a longer-lasting seal between the piston and cylinder wall. This improved seal is crucial for maintaining compression, controlling oil consumption, and ultimately, ensuring the engine performs as it should. The second ring, often overlooked, plays a vital role in oil control and also assists in breaking up the oil film on the cylinder wall, preventing excessive oil from reaching the combustion chamber.

When you're rebuilding an engine, the piston rings are one of those parts that you don't want to cut corners on. They are constantly working under extreme conditions. This 48-piece bulk pack from Mahle OE offers a practical solution for engine builders who need a reliable, well-made ring set for multiple projects or for a high-volume shop. Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your specific engine's service manual for proper installation procedures and ring gap specifications.