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

Plasma moly steel is a strong material used for piston rings because it offers excellent wear resistance and can withstand high temperatures. The plasma coating further reduces friction between the ring and the cylinder wall, which helps extend the life of both components.

What does a bulk pack of 48 ring sets mean for me?

A bulk pack of 48 sets is ideal for engine builders or shops that work on multiple engines with the same bore size. It ensures you have enough rings on hand for several projects, potentially saving time and money compared to buying smaller quantities repeatedly.

Are these rings compatible with all engine types?

These rings are designed for engines with a 4.090-inch bore diameter. While they are a direct replacement for many applications, it's always best to verify compatibility with your specific engine model and build specifications before installation.

Mahle OE Piston Rings 3010978B - 4.090in Bore

Name: Mahle Rings Plasma Moly Steel 1.5MM x .151 RW 4.090in Bore Diameter Moly Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-plasma-moly-steel-1-5mm-x-151-rw-4-090in-bore-diameter-moly-t14-47623
Price: 667.37 USD
Availability: BackOrder

Mahle Rings Plasma Moly Steel 1.5MM x .151 RW 4.090in Bore Diameter Moly Ring Set (48 Qty Bulk Pack)

$667.37

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 Moly Ring Set for 4.090in bore. Features plasma moly steel construction for durability. Bulk pack of 48.

Key Features

Fits engines with a 4.090-inch bore diameter.
Features a 1.5mm top ring and a .151-inch second ring.
Constructed from plasma moly steel for improved durability and wear resistance.
Bulk pack includes 48 sets of piston rings.
Designed as a direct replacement for many engine builds.
Helps maintain cylinder compression and control oil consumption.

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Product Details

Mahle is known for making solid engine components that go into a lot of factory vehicles. This particular set of piston rings, part number 3010978B, is a bulk pack of 48, designed for a 4.090-inch bore diameter. They feature a 1.5mm top ring and a .151-inch second ring, both made from plasma moly steel. This material is well-known for its strength and ability to handle the heat and friction inside an engine cylinder.

These rings are built to be a direct replacement for many applications, ensuring a proper seal between the piston and the cylinder wall. A good seal is critical for maintaining compression, controlling oil consumption, and getting the most out of your engine's performance. The plasma moly coating on these rings helps reduce friction and wear, which can extend the life of both the rings and the cylinder walls. This is especially important in high-performance or heavy-duty applications where engines are pushed harder.

This is a bulk pack, meaning you get 48 sets of rings, making it a practical choice for engine builders or shops working on multiple engines with the same bore size. Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper ring gap setting and installation procedures to ensure optimal performance and longevity.