What is the purpose of the plasma steel and HVOF Moly coating on these rings?

The plasma steel construction offers improved strength and heat resistance. The HVOF Moly coating is a very durable surface treatment that helps reduce friction and wear, ensuring better sealing and a longer lifespan for the rings and cylinder walls.

Are these rings suitable for all types of engines?

These rings are designed for a 4.000-inch bore and feature performance-oriented materials. They are best suited for performance builds or engines where durability and precise sealing are critical. Always verify compatibility with your specific engine's requirements and specifications.

What does 'RW HVOF Moly Ring Set' mean?

RW stands for Right Width, referring to the 0.143 inch width of the second land on the piston where this ring sits. HVOF Moly indicates the High Velocity Oxygen Fuel Molybdenum coating applied to the ring for enhanced durability and performance.

Mahle OE Piston Rings 3011052B - Performance Plasma Steel

Name: Mahle Rings Perf Plasma Steel Top Ring 4.000in 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-4-000in-x-1-0mm-143in-rw-hvof-mo-t14-47941
Price: 638.41 USD
Availability: BackOrder

Mahle Rings Perf Plasma Steel Top Ring 4.000in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

$638.41

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 ring set for 4.000in bores. Bulk pack of 48 rings.

Key Features

Fits 4.000 inch bore engines.
Top ring is made from plasma-sprayed steel for strength and heat resistance.
Features an HVOF Moly coating for improved wear resistance and sealing.
Ring dimensions are 1.0mm height and 0.143 inch second land width (RW).
Bulk pack includes 48 rings, suitable for multiple engines or builds.
Not CARB approved; cannot ship to California.

These piston rings are designed for a 4.000 inch bore. Always consult your vehicle's service manual or a qualified mechanic to confirm compatibility with your specific engine.

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Product Details

Mahle is a well-known name in the automotive industry, often recognized for their OE (Original Equipment) quality components. This particular product, the Mahle Rings Perf Plasma Steel Top Ring set, is built for serious engine work where precision and durability are key. These rings are designed for a 4.000-inch bore, a common size in many performance and heavy-duty applications. The top ring features a plasma-sprayed steel construction with an HVOF (High Velocity Oxygen Fuel) Moly coating, which is a tough, wear-resistant surface treatment that helps ensure a long service life and good sealing.

The specific dimensions of these top rings are 1.0mm in height and 0.143 inches for the second land width, often referred to as RW (Right Width). This precise sizing is critical for proper piston-to-cylinder wall sealing, which directly impacts engine performance, oil consumption, and emissions. The plasma steel material offers improved strength and heat resistance compared to cast iron, while the HVOF Moly coating further enhances its ability to withstand the harsh environment inside an engine cylinder. This bulk pack contains 48 rings, making it suitable for engine builders or shops working on multiple engines or high-performance builds requiring a set for each cylinder.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to your specific engine's service manual for detailed installation instructions and recommended procedures when rebuilding your engine.