What is the benefit of plasma-moly coating on piston rings?

Plasma-moly coating, applied via HVOF thermal spray, creates a very dense and durable surface on the top ring. This improves wear resistance and reduces friction, helping the rings seat quickly and maintain a strong seal.

What bore size are these rings intended for?

These Mahle OE piston rings are designed for engines with a 4.005-inch cylinder bore.

Are these rings suitable for all engine builds?

These rings are a popular choice for performance builds due to their plasma-moly coating and durable construction. However, they are not CARB approved and cannot be shipped to California.

Mahle Performance Piston Rings 3011053B

Name: Mahle Rings Perf Plasma Steel Top Ring 4.005in 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-4-005in-x-1-0mm-143in-rw-hvof-mo-t14-47939
Price: 479.51 USD
Availability: BackOrder

Mahle Rings Perf Plasma Steel Top Ring 4.005in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

$479.51

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 Piston Rings. Plasma steel top ring, HVOF Moly. Part# 3011053B. Verified fitment. Fast shipping.

Key Features

This is a bulk pack containing 48 ring sets.
Top rings feature plasma-moly coating applied via HVOF thermal spray for improved wear resistance and reduced friction.
Designed for a 4.005-inch bore size.
Top ring thickness is 1.0mm.
Oil ring groove is 0.143 inches wide.

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Product Details

If you're rebuilding the top end of an engine, getting the right piston rings is critical for sealing combustion and controlling oil. This set from Mahle OE features plasma-moly coated top rings, a popular choice for performance builds because they offer improved wear resistance and reduced friction compared to plain cast iron rings. The plasma coating is applied using HVOF (High Velocity Oxygen Fuel) thermal spray, creating a very dense and durable surface that mates well with cylinder walls.

These rings are designed for a 4.005-inch bore size and have a 1.0mm thickness for the top ring, with a 3/16-inch (0.143 inch) oil ring groove. The HVOF moly coating on the top ring helps it seat quickly and maintain a strong seal under pressure, which is important for both power and efficiency. Mahle OE is a well-known name in engine components, and this bulk pack is a solid option for shops or builders working on multiple engines or a high-performance application where durability and sealing are key.