What is the benefit of the gas nitride treatment on the top compression ring?

The gas nitride treatment hardens the surface of the top compression ring. This makes it more resistant to wear and helps it create a better seal against the cylinder wall, especially in high-performance engines.

What does the '48 Qty Bulk Pk' mean?

This package contains 48 individual sets of piston rings. It's intended for engine builders or shops that work on multiple engines at once.

Are these rings suitable for a standard engine rebuild?

Yes, these steel rings are well-built and the nitride treatment offers improved durability and sealing, making them a solid choice for performance-oriented rebuilds or engines that will see demanding use.

Mahle OE Piston Rings 3011154B - Steel Nitride

Name: Mahle Rings Gas Nitride Steel Perf Top Comp 4.250in x .043in .170 RW Plain Ring Set (48 Qty Bulk Pk)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-gas-nitride-steel-perf-top-comp-4-250in-x-043in-170-rw-plai-t14-49565
Price: 582.62 USD
Availability: BackOrder

Mahle Rings Gas Nitride Steel Perf Top Comp 4.250in x .043in .170 RW Plain Ring Set (48 Qty Bulk Pk)

$582.62

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 steel piston rings with nitride treated top compression rings. 4.250in bore, 0.043in thickness. Bulk pack of 48.

Key Features

Fits 4.250 inch bore engines.
Top compression ring features a gas nitride surface treatment for improved wear resistance and sealing.
Made from durable steel.
Top compression ring thickness is 0.043 inches.
Includes 48 sets of piston rings in a bulk pack.
Designed for performance applications.

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Product Details

The top compression ring on these Mahle piston rings is treated with a gas nitride process. This hardens the surface, making it more resistant to wear and helping it seal better against the cylinder wall, especially under high performance conditions. These rings are made from steel and are designed for a 4.250 inch bore with a 0.043 inch thickness for the top compression ring.

This is a bulk pack containing 48 sets of rings, making it a solid option for engine builders or shops working on multiple engines. The steel construction offers good durability, and the nitride treatment is a notable step up for performance applications where heat and stress are higher. Proper ring seal is critical for engine power, oil control, and overall longevity, and these rings are built to help achieve that.

When installing these rings, it's important to follow the manufacturer's guidelines for gap setting and seating. Ensure the cylinder walls are properly honed to match the ring type and intended use. Because these are performance-oriented rings, paying close attention to the break-in procedure is also key to ensuring they seat correctly and provide long service life.