What is a Napier ring design?

A Napier ring has a unique hook shape on its back. This design helps to scrape oil from the cylinder wall more effectively during the piston's downstroke, improving oil control and reducing oil consumption.

What is the advantage of a steel second ring?

Steel second rings are generally stronger and more durable than cast iron rings, making them a popular choice for performance applications where higher cylinder pressures and temperatures are common. They offer good wear resistance.

Is this a complete set for one engine?

This is a bulk pack containing 48 rings. Depending on your engine's cylinder count and whether you need both top and second rings, you may need multiple packs or additional ring sets. This specific item is for the second ring position.

Mahle OE Piston Rings 3021231B

Name: Mahle Rings Perf Napier Steel 2nd Ring 4.270in x 1.0MM .136in RW Plain Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-napier-steel-2nd-ring-4-270in-x-1-0mm-136in-rw-plain-r-t14-48404
Price: 293.08 USD
Availability: BackOrder

Mahle Rings Perf Napier Steel 2nd Ring 4.270in x 1.0MM .136in RW Plain Ring Set (48 Qty Bulk Pack)

$293.08

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 performance Napier steel 2nd ring set for 4.270in bore. Bulk pack of 48 rings.

Key Features

Fits a 4.270-inch cylinder bore.
Features a 1.0mm thickness and 0.136-inch ring height.
Napier hook design on the second ring aids in oil control.
Constructed from durable steel for reliable performance.
Bulk pack contains 48 individual rings.
Mahle OE is a trusted brand for engine components.

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Product Details

This is a bulk pack of 48 Mahle OE performance Napier steel second rings. These rings are designed for a 4.270-inch bore and feature a 1.0mm thickness with a 0.136-inch height. The Napier design helps improve oil control and reduce blow-by, especially in high-performance applications. They are well-built for durability and consistent sealing under demanding engine conditions.

The Napier hook design on the second ring is a notable feature that helps scrape oil from the cylinder wall on the downstroke and prevents it from entering the combustion chamber. This contributes to improved engine performance and reduced oil consumption. Mahle OE is a well-known name in engine components, and these rings are made to meet strict manufacturing standards for reliable operation.

This bulk pack is ideal for engine builders or shops that frequently work on engines requiring this specific ring size and type. Always ensure these rings are compatible with your specific piston and cylinder bore before installation. Refer to manufacturer installation instructions for proper fitment and assembly procedures.