What is the primary benefit of the plasma-sprayed steel construction?

The plasma-sprayed steel construction offers improved wear resistance compared to standard cast iron rings. This helps ensure a longer lifespan and consistent performance, especially in high-stress engine applications.

What does the HVOF Moly coating do for these piston rings?

The High Velocity Oxy-Fuel (HVOF) Molybdenum coating on the top ring creates a hard, wear-resistant surface. This helps maintain a tight seal against the cylinder wall, reduces friction, and contributes to better heat management within the cylinder.

Why are these rings not CARB approved?

These specific piston rings are not approved by the California Air Resources Board (CARB). Therefore, they cannot be shipped to addresses within California due to emissions regulations.

Mahle OE Piston Rings 3011088B - Performance Steel

Name: Mahle Rings Perf Plasma Steel Top Ring 4.275in 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-4-275in-x-1-0mm-143in-rw-hvof-mo-t14-47851
Price: 836.85 USD
Availability: BackOrder

Mahle Rings Perf Plasma Steel Top Ring 4.275in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

$836.85

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 steel top piston rings. 4.275in bore, 1.0mm thickness. Bulk pack of 48.

Key Features

Fits engines with a 4.275 inch bore.
Top ring measures 1.0mm in thickness.
Features a 3/16 inch (4.5mm) second land width.
Plasma-sprayed steel construction offers improved wear resistance.
HVOF Moly coating on the top ring enhances durability and reduces friction.
Bulk pack includes 48 rings, suitable for multiple engine builds.

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Product Details

Mahle OE performance steel top piston rings are built for demanding engine builds. This set features a 4.275-inch bore size with a 1.0mm top ring thickness and a 3/16-inch (4.5mm) second land width, designed for engines that require robust sealing and durability under high stress. The plasma-sprayed steel construction offers improved wear resistance compared to cast iron, making them a solid choice for performance applications where engine longevity and consistent compression are critical.

These rings utilize a High Velocity Oxy-Fuel (HVOF) Molybdenum coating on the top ring, a well-known method for creating a hard, wear-resistant surface that mates well with cylinder walls and helps maintain a tight seal. This advanced coating helps reduce friction and heat buildup, contributing to improved engine efficiency and performance. The 48-piece bulk pack is ideal for engine builders or shops working on multiple engines, ensuring you have the necessary components on hand for a variety of projects. While these rings are built for performance, please note they are not CARB approved and cannot be shipped to California.