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

The High Velocity Oxy-Fuel (HVOF) molybdenum coating is applied to enhance durability and reduce friction. This advanced coating helps the rings wear better against the cylinder wall, contributing to a longer engine life and consistent performance.

What does the 'Napier hook' refer to?

The Napier hook refers to a specific shape on the back of the piston ring, designed to improve oil control. This feature helps to scrape excess oil from the cylinder wall as the piston moves, preventing it from entering the combustion chamber.

Can these rings be used in all engine builds?

These rings are intended for engine builds requiring a 4.295-inch bore and feature performance-oriented coatings. They are not CARB approved and cannot be shipped to California. Always verify compatibility with your specific piston and engine requirements.

Mahle OE Piston Rings 3011091B - Performance Steel

Name: Mahle Rings Perf Plasma Steel Top Ring 4.295in 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-4-295in-x-1-0mm-143in-rw-hvof-mo-t14-47845
Price: 923.72 USD
Availability: BackOrder

Mahle Rings Perf Plasma Steel Top Ring 4.295in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

$923.72

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 rings. 4.295in bore, 1.0mm thickness. Bulk pack for engine builds.

Key Features

Fits engines with a 4.295-inch bore.
Top ring thickness is 1.0mm.
Features a 0.143-inch Napier hook.
Utilizes a High Velocity Oxy-Fuel (HVOF) molybdenum coating for improved wear resistance.
Constructed from durable steel for strength and resilience.
Bulk pack includes 48 rings, suitable for multiple engine builds.

These piston rings are designed for engines with a 4.295-inch bore. Always confirm compatibility with your specific engine and piston manufacturer's specifications.

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Product Details

This is a bulk pack of Mahle OE performance plasma steel top piston rings, designed for engine rebuilding applications with a 4.295-inch bore. These rings feature a 1.0mm thickness and a 0.143-inch Napier hook, utilizing a High Velocity Oxy-Fuel (HVOF) molybdenum coating for improved durability and performance. This set contains 48 rings, making it ideal for shops or builders working on multiple engines or high-volume projects.

The plasma-moly coating on these top rings is applied using an advanced HVOF process, which creates a very dense and well-bonded layer. This coating helps reduce friction between the piston ring and cylinder wall, leading to less wear over time and better sealing. The steel construction offers good strength and resilience, important for maintaining compression and controlling oil consumption under demanding conditions. These rings are built to handle the stresses of performance engines, ensuring reliable operation.

Because this is a bulk pack, it's important to note that it is not CARB approved and cannot be shipped to California. Ensure you check manufacturer specifications for compatibility with your specific engine build and piston type before ordering.