What is the purpose of the plasma-moly coating on these rings?

The plasma-moly coating on the top ring is applied using HVOF thermal spray. This creates a dense, well-bonded layer that improves durability and helps reduce friction, which is beneficial for performance engines.

Can these rings be shipped to California?

No, this ring set is not CARB approved and cannot be shipped to California due to emissions regulations.

What does the 4.155in bore size refer to?

The 4.155-inch bore size indicates the diameter of the cylinder that these piston rings are designed to fit into. It's crucial to match this dimension to your engine's cylinder bore for proper sealing.

Mahle OE Piston Rings 3011072

Name: Mahle Rings Performance Plasma Steel Top Ring 4.155in x 1.0MM .143in RW HVOF Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-performance-plasma-steel-top-ring-4-155in-x-1-0mm-143in-rw--t14-47878
Price: 120.79 USD
Availability: BackOrder

Mahle Rings Performance Plasma Steel Top Ring 4.155in x 1.0MM .143in RW HVOF Moly Ring Set

$120.79

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 Steel Top Ring Set. Check manufacturer fitment data to confirm compatibility with your vehicle.

Key Features

Mahle OE Plasma Steel Top Ring Set, part number 3011072.
Features a plasma-moly coating on the top ring for enhanced durability and reduced friction.
Steel construction provides strength for performance engine applications.
Top ring thickness is 1.0mm.
Designed for a 4.155-inch bore size.
HVOF thermal spray application for the plasma-moly coating ensures a dense and well-bonded layer.

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Product Details

This is a Mahle OE Plasma Steel Top Ring Set, part number 3011072. These rings are designed for performance applications and feature a plasma-moly coating on the top ring for improved durability and reduced friction. The steel construction offers strength, and the 1.0mm top ring thickness is common in many performance engine builds. This set is intended for engines requiring a 4.155-inch bore size.

The plasma-moly coating, applied using HVOF (High-Velocity Oxygen Fuel) thermal spray, creates a very dense and well-bonded layer that stands up well to heat and wear. This is a critical component for sealing the combustion chamber effectively, which is essential for both power and efficiency. Proper ring seal ensures that combustion pressure is directed downwards to the piston crown, rather than leaking past the rings into the crankcase.

Please note that this ring set is not CARB approved and cannot be shipped to California. Always consult your engine's service manual or Mahle's specific application data to ensure this is the correct ring set for your rebuild.