What is the advantage of nitride steel rings?

Nitride steel treatment hardens the surface of the top and second compression rings. This makes them more resistant to scuffing and wear, especially in high-temperature and high-pressure engine conditions, which helps maintain a better seal.

What does the 'RW Bulk Plain Ring Set' designation mean?

RW typically refers to the ring type, often indicating a specific configuration for the oil ring. 'Bulk Plain' signifies that these are individual sets packaged in bulk for professional use, rather than retail packaging. The '48 Qty' indicates there are 48 complete sets in this package.

Are these rings suitable for all engine types?

These rings are specifically designed for gasoline performance engines and are intended for a 4.040 inch bore. While they offer improved durability, they are not CARB approved and cannot be shipped to California. Always confirm compatibility with your specific engine build and intended use.

Mahle OE Piston Rings 3011169B - Performance Gas

Name: Mahle Rings Perf Gas Nitride Steel 4.040 x .043 .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-gas-nitride-steel-4-040-x-043-157-rw-bulk-plain-ring-s-t14-48642
Price: 505.64 USD
Availability: BackOrder

Mahle Rings Perf Gas Nitride Steel 4.040 x .043 .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)

$505.64

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 Gas Piston Rings. 4.040" bore size, .043"/.043"/.157" ring sizes. Bulk pack of 48 sets.

Key Features

Fits 4.040 inch bore engines.
Top and second rings are nitride steel for improved wear resistance.
Oil ring is a 3-piece design for effective oil control.
Ring groove dimensions are .043"/.043"/.157".
Bulk pack contains 48 sets of piston rings.
Designed for gasoline performance engines.

This is a bulk pack of 48 sets of piston rings designed for a 4.040 inch bore. Check manufacturer specifications to confirm compatibility with your specific engine build.

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Product Details

Mahle OE Performance Gas Piston Rings are a bulk pack of 48 sets, designed for 4.040 inch bore applications. These rings feature a nitride steel construction for the top and second rings, offering improved durability and wear resistance for gasoline engines. The oil ring is a 3-piece design, ensuring effective oil control. This set is intended for engine builders and performance shops that frequently work on engines requiring this specific bore size and performance characteristics.

The nitride treatment on the top and second compression rings is a key feature, providing a harder surface that resists scuffing and wear, especially under higher operating temperatures and pressures common in performance applications. This treatment also helps to create a better seal against the cylinder wall, which is crucial for maintaining compression and preventing blow-by. The 4.040 inch bore size is a common dimension for many V8 and performance-oriented engines, making this a versatile option for rebuilds. The ring groove dimensions are .043 inches for the top and second rings, and .157 inches for the oil ring, which are standard dimensions for many performance pistons.

This bulk pack of 48 sets is ideal for professional engine builders or shops that handle a high volume of engine rebuilds. It allows for efficient inventory management and ensures you have a reliable set of performance piston rings on hand when needed. While these rings are built for performance, it's important to note they are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper ring gap setting and installation procedures to ensure optimal engine performance and longevity.