What is a Napier-style second ring?

A Napier-style second ring has a specific shape, often with a groove on the bottom, that helps it scrape oil more effectively from the cylinder wall. This design is beneficial for improving oil control and preventing oil from entering the combustion chamber.

What does the bore size of 4.305 inches mean?

The 4.305-inch bore size indicates the diameter of the cylinder that these piston rings are designed to fit. It's crucial to match this dimension precisely to your engine's cylinder bore for proper sealing and performance.

Are these rings suitable for all engine types?

These are performance steel piston rings designed for demanding applications. While they can be used in many engine builds, it's important to ensure they match the specific requirements of your engine's bore size and performance goals.

Mahle OE Piston Rings 3021346B - Performance Steel

Name: Mahle Rings Perf Steel Napier 2nd Ring 4.305in x .043 .135in RW Plain Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-steel-napier-2nd-ring-4-305in-x-043-135in-rw-plain-rin-t14-47734
Price: 286.72 USD
Availability: BackOrder

Mahle Rings Perf Steel Napier 2nd Ring 4.305in x .043 .135in RW Plain Ring Set (48 Qty Bulk Pack)

$286.72

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 Steel Piston Rings. This bulk pack of 48 rings features a 4.305in bore size and a .043in x .135in Napier 2nd ring for improved sealing.

Key Features

This is a bulk pack containing 48 piston rings.
Features a 4.305-inch bore size.
Includes a Napier-style second ring measuring .043 inches thick by .135 inches deep.
Made from steel for improved durability.
Designed for performance applications to help with oil control and sealing.
Not CARB approved; cannot ship to California.

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Product Details

Starting with a 4.305-inch bore size, this set of Mahle OE performance steel piston rings is built for serious engine work. The key feature here is the Napier-style second ring, measuring .043 inches thick and .135 inches deep. This design helps improve oil control and can prevent blow-by, especially in high-performance applications where the engine is pushed harder.

This is a bulk pack containing 48 rings, making it a solid option for shops or builders working on multiple engines or larger projects. Mahle OE is a well-known name in engine components, and these rings are made from steel for durability. They are designed to fit right and perform reliably under demanding conditions, helping to maintain good compression and seal the combustion chamber effectively.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. If you're rebuilding a performance engine and need a reliable set of piston rings, this Mahle OE pack offers a good balance of performance features and quantity.