What is the benefit of the plasma-moly coating?

The plasma-moly coating, applied using HVOF thermal spray, offers excellent wear resistance and reduces friction between the piston ring and the cylinder wall. This helps maintain a proper seal under demanding conditions.

What does the HVOF process mean for these rings?

HVOF (High Velocity Oxygen Fuel) is an advanced thermal spray process that creates a dense, well-bonded coating. This results in a more durable and effective wear surface compared to some other coating methods.

Why are these rings not CARB approved?

These specific piston rings are not approved by the California Air Resources Board (CARB). Therefore, they cannot be legally shipped to or installed on vehicles registered in California.

Mahle OE Piston Rings 3011261B

Name: Mahle Rings Perf Plasma Steel Top Ring 3.801in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-plasma-steel-top-ring-3-801in-x-1-0mm-143in-rw-hvof-mo-t14-47962
Price: 581.91 USD
Availability: BackOrder

Mahle Rings Perf Plasma Steel Top Ring 3.801in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

$581.91

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 steel top piston rings. 3.801in x 1.0MM x .143in.

Key Features

Fits a 3.801-inch bore.
Top ring thickness is 1.0mm.
Features a .143-inch oil ring groove.
Plasma-moly coating applied via HVOF thermal spray for wear resistance.
Steel construction for durability.
Bulk pack includes 48 rings.

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Product Details

Mahle is a well-known name in the automotive industry, particularly for their engine components. This set of performance plasma steel top piston rings is a prime example of their commitment to engine building. These rings are designed for a 3.801-inch bore and feature a 1.0mm top ring thickness with a .143-inch oil ring groove, utilizing an HVOF moly coating for improved durability and performance.

The plasma-moly coating on these top rings is applied using High Velocity Oxygen Fuel (HVOF) thermal spray technology. This advanced process creates a dense, well-bonded layer that offers excellent wear resistance and reduces friction between the ring and cylinder wall. This is crucial for maintaining proper seal under high loads and temperatures, helping to prevent blow-by and ensure efficient combustion. The steel construction also provides a strong, reliable base for this performance coating.

This is a bulk pack containing 48 rings, making it suitable for engine builders or shops working on multiple engines. While these rings are built for performance, please note they are not CARB approved and cannot be shipped to California. Always refer to manufacturer installation instructions for proper fitment and assembly procedures.