What is the benefit of the plasma-moly coating?

The plasma-moly coating is a very hard and wear-resistant layer that reduces friction between the piston ring and cylinder wall. This helps to improve engine efficiency, lower operating temperatures, and extend the life of both the rings and the cylinder walls.

What does HVOF mean for these rings?

HVOF stands for High Velocity Oxygen Fuel. It's a thermal spray process used to apply the plasma-moly coating. This method creates a dense, well-bonded layer that is exceptionally durable and performs well under high-stress conditions.

Are these rings suitable for all engine builds?

These rings are designed for performance applications and are made from steel with a specialized coating. They are intended for engine builders working on performance engines where durability and high-stress capability are important. Always verify compatibility with your specific piston and cylinder bore.

Mahle OE Piston Rings 3011128B - Performance Plasma Steel

Name: Mahle Rings Perf Plasma Steel Top Ring 4.075in 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-4-075in-x-1-0mm-143in-rw-hvof-mo-t14-47911
Price: 603.80 USD
Availability: BackOrder

Mahle Rings Perf Plasma Steel Top Ring 4.075in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

$603.80

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. 4.075in bore, 1.0mm thickness.

Key Features

Fits a 4.075 inch bore diameter.
Top ring thickness is 1.0mm.
Features a plasma-moly coating applied via HVOF thermal spray for improved wear resistance and reduced friction.
Constructed from steel for strength and durability.
Ring groove width is 0.143 inches.
Comes in a bulk pack of 48 rings.

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Product Details

These Mahle OE performance top piston rings feature a plasma-moly coating applied using HVOF (High Velocity Oxygen Fuel) thermal spray. This advanced coating process creates a dense, well-bonded layer that's exceptionally hard and wear-resistant, crucial for the high-stress environment of a performance engine. The rings are made from steel and measure 4.075 inches in bore diameter with a 1.0mm thickness and a 0.143-inch ring groove width, designed for a precise fit in performance pistons.

The plasma-moly coating is a key feature for performance applications. It significantly reduces friction between the piston ring and cylinder wall, which helps to improve efficiency and reduce heat buildup. This also means the rings can withstand higher operating temperatures and pressures without premature wear. The steel construction offers good strength and durability, ensuring these rings can handle the demands of a performance build. This bulk pack contains 48 rings, making it suitable for engine builders or shops working on multiple performance engines.

When rebuilding a performance engine, selecting the right piston rings is critical for sealing, oil control, and overall engine health. These Mahle rings are a solid choice for builders looking for a durable and high-performing ring set that can stand up to demanding use. Always ensure your cylinder walls are properly honed and that you follow the manufacturer's recommended ring gap specifications for your specific application to achieve optimal performance and longevity.