What is plasma moly steel and why is it used for piston rings?

Plasma moly steel is a strong material that has been coated using a plasma spray process with molybdenum. This coating helps reduce friction between the ring and the cylinder wall, improving wear resistance and engine efficiency.

What does the bulk pack of 48 rings mean for my build?

This bulk pack is ideal for engine builders or shops that frequently work on V8 engines or other applications requiring multiple sets of rings. It ensures you have enough rings on hand for several builds or for engines with many cylinders.

Are these rings compatible with all pistons?

These rings are designed for a specific bore size (4.020 inches) and piston groove width (0.190 inches). You must ensure your pistons match these specifications for proper fitment and function.

Mahle OE Piston Rings 3011014B - 4.020" Bore

Name: Mahle Rings Perf Plasma Moly Steel Top Comp Ring 4.020 x .0625 .190 RW Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-plasma-moly-steel-top-comp-ring-4-020-x-0625-190-rw-ri-t14-48025
Price: 625.00 USD
Availability: BackOrder

Mahle Rings Perf Plasma Moly Steel Top Comp Ring 4.020 x .0625 .190 RW Ring Set (48 Qty Bulk Pack)

$625.00

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 plasma moly steel top compression rings. 4.020" bore size, 0.0625" thick. Bulk 48-piece pack.

Key Features

Fits a 4.020 inch bore size.
Top compression ring measures 0.0625 inches thick.
Features a 0.190 inch ring groove width.
Constructed from plasma-moly steel for improved durability and wear resistance.
Sold in a bulk pack of 48 rings, suitable for multiple engine builds.
Designed for performance engine applications.

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Product Details

Mahle OE performance plasma moly steel top compression rings are designed for builders who need a bulk supply of reliable components. This set includes 48 rings, each measuring 4.020 inches in bore diameter with a 0.0625-inch thickness and a 0.190-inch ring groove width. These rings are built with plasma-moly steel, a strong material known for its durability and resistance to wear, making them a solid choice for performance engine builds.

The plasma-moly coating on these top compression rings helps reduce friction and improve sealing against the cylinder wall. This updated design contributes to better combustion efficiency and can help maintain consistent compression over the life of the engine. Because these are sold in a bulk pack of 48, they are ideal for engine shops or builders who frequently work on V8 engines or other applications requiring multiple sets. The precise sizing ensures a proper fit in the corresponding piston groove, which is critical for proper ring function and engine health.

When rebuilding an engine, especially one intended for performance use, the quality of the piston rings plays a significant role in the overall outcome. Mahle OE rings are a well-known option in the performance engine building community. Ensure you have the correct piston groove width and bore size for these rings before ordering. Please note that this product is not CARB approved and cannot be shipped to California.