What is the benefit of the nitride coating on these piston rings?

The nitride coating hardens the surface of the steel rings. This makes them more resistant to wear and heat, which is important for maintaining a good seal and extending the life of the rings, especially in performance engines.

What does 'plain ring set' mean in this context?

A 'plain ring set' typically means the rings are supplied without any additional coatings or treatments beyond what's standard for the material and type, such as the nitride coating mentioned. They are ready for installation after proper cleaning and preparation, without special break-in coatings.

Are these rings suitable for all engine types?

These specific Mahle rings are designed for gasoline engines and a 4.025 inch bore. They are intended for performance applications and are not CARB approved, meaning they cannot be shipped to California.

Mahle OE Piston Rings 3011166B - 4.025" Bore

Name: Mahle Rings Perf Gas Nitride Steel 4.025 x .043 .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-gas-nitride-steel-4-025-x-043-157-rw-bulk-plain-ring-s-t14-48648
Price: 557.90 USD
Availability: BackOrder

Mahle Rings Perf Gas Nitride Steel 4.025 x .043 .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)

$557.90

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 for 4.025" bore engines. Nitrided for performance. Bulk 48-piece pack.

Key Features

This product is a bulk pack containing 48 sets of piston rings.
The piston rings are constructed from durable steel.
A nitride coating is applied to the rings for improved wear resistance and heat tolerance.
Designed for a 4.025 inch engine bore size.
Features top and second rings measuring .043 inches thick.
The oil ring measures .157 inches wide.

This is a bulk pack of piston rings designed for a 4.025 inch bore size. Check manufacturer specifications to confirm compatibility with your specific engine build.

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Product Details

In this bulk pack, you're getting 48 sets of Mahle OE performance piston rings. These rings are made from steel and feature a nitride coating, which is a tough surface treatment that helps them stand up to heat and wear. The bore size they're designed for is 4.025 inches, and the ring dimensions are .043 inches for the top and second rings, with a .157 inch oil ring width. This specific set is intended for gasoline engines and comes as a plain ring set, meaning it's ready for installation in a performance build.

Mahle is a well-known name in engine components, and these rings are built with their OE (Original Equipment) standards in mind, but with performance enhancements. The nitride coating is a key feature here; it hardens the ring surface, which not only improves durability but also helps maintain a good seal against the cylinder wall under demanding conditions. This is crucial for getting the most out of your engine, whether you're rebuilding a classic performance car or a heavy-duty truck engine. The 4.025-inch bore size is common in many V8 performance applications, and having 48 sets in a bulk pack means you're well-equipped for a shop that does a lot of these types of builds or for a large project.

When you're installing these, remember that proper cylinder wall preparation and piston groove cleaning are essential for a good seal and long ring life. While these are designed for performance, it's important to note they are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for detailed installation procedures and break-in recommendations to ensure optimal performance and longevity from your new Mahle piston rings.