What is plasma moly steel and why is it used for piston rings?

Plasma moly steel is a strong and durable material chosen for its ability to withstand high temperatures and pressures within an engine cylinder. The plasma moly coating further enhances durability and reduces friction against the cylinder wall, contributing to better engine performance and longevity.

What does the 'RW' designation mean on these rings?

The 'RW' designation typically refers to the ring's face design, indicating a specific type of groove engagement and sealing profile. For precise application details, consult your engine's service manual or Mahle's technical specifications.

Are these rings suitable for all engine builds?

These rings are designed for a specific bore size (4.505 inches) and thickness (0.0625 inches). They are intended for engine rebuilding applications where these dimensions are specified. Always verify compatibility with your engine's specifications before purchase.

Mahle OE Piston Rings 4.505in Plasma Moly Steel RW Ring Set

Name: Mahle Rings Plasma Moly Steel Top Comp Ring 4.505in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-plasma-moly-steel-top-comp-ring-4-505in-x-0625in-190in-rw-r-t14-47569
Price: 735.87 USD
Availability: BackOrder

Mahle Rings Plasma Moly Steel Top Comp Ring 4.505in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)

$735.87

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 Plasma Moly Steel Top Compression Rings. 4.505in bore size, 0.0625in thickness. Bulk pack of 48 rings. Not CARB approved.

Key Features

Fits 4.505 inch bore size.
Top compression ring with 0.0625 inch thickness.
Constructed from plasma moly steel for durability.
Features a plasma moly coating to reduce friction.
Bulk pack includes 48 rings for multiple engine builds.
OE-spec replacement part from Mahle.

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Product Details

When you're rebuilding a high-performance engine or working on a fleet of vehicles that demand reliability, getting the right piston rings is crucial for sealing the combustion chamber. This bulk pack of Mahle OE Plasma Moly Steel Top Compression Rings is designed for serious engine work, offering a robust solution for multiple builds or professional shops. These rings are made from plasma moly steel, a strong material known for its durability and ability to withstand the heat and pressure inside an engine cylinder.

The plasma moly coating on these rings helps reduce friction between the ring and the cylinder wall, which can lead to improved engine efficiency and a longer lifespan for both the rings and the cylinder. With a bore size of 4.505 inches and a thickness of 0.0625 inches, these rings are intended for specific engine applications where precise fitment is key. This pack contains 48 rings, making it a practical choice for engine builders who need a consistent supply of high-quality components for multiple projects. Mahle is a well-known name in engine parts, and these OE-spec rings reflect their commitment to providing reliable components for engine rebuilding.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always ensure these rings are compatible with your specific engine build and refer to your engine's service manual for proper installation procedures and specifications.