What is the benefit of plasma moly coating on the top ring?

The plasma moly coating on the top ring helps to reduce friction between the piston ring and the cylinder wall. This can lead to improved engine efficiency and longer ring life.

Are these rings suitable for all engine rebuilds?

These rings are designed for standard tension applications and a 4.040-inch bore. They are a popular choice for many common engine rebuilds, but it's always best to confirm they match your specific engine's requirements.

What does 'ductile iron' mean for the second ring?

Ductile iron is a strong and tough material that is less brittle than gray cast iron. Using ductile iron for the second ring helps to prevent breakage under the stresses of engine operation.

Mahle OE Piston Ring Set 3150139.040

Name: Mahle Rings 4.040in Bore 1/16in 3.00MM Plasma Moly Ductile Std Tension Engine Set Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-4-040in-bore-1-16in-3-00mm-plasma-moly-ductile-std-tension--t14-51866
Price: 157.76 USD
Availability: BackOrder

Mahle Rings 4.040in Bore 1/16in 3.00MM Plasma Moly Ductile Std Tension Engine Set Moly Ring Set

$157.76

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 Piston Ring Set for 4.040in bore engines. Features plasma moly ductile rings for standard tension.

Key Features

Fits engines with a 4.040-inch bore.
Top ring features a plasma moly coating for improved wear resistance and reduced friction.
Ductile iron second ring offers added durability.
Standard tension design for reliable sealing in common applications.
Top ring width is 1/16 inch, and the second ring width is 3.00mm.

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Product Details

These Mahle piston rings feature a plasma moly coating on the top ring, which is a tough material that helps reduce friction and wear. They're designed for a 4.040-inch bore and use standard tension, meaning they're built to seal well in most common engine applications without being overly tight. The ductile iron second ring adds durability, helping to prevent breakage under stress.

When you're rebuilding an engine, getting the piston rings right is crucial for proper compression and oil control. Mahle has been a well-known name in engine components for a long time, and these rings are made to meet OE specifications. The 1/16 inch top ring width and 3.00mm second ring width are common sizes, making them suitable for many popular engine builds where you need a reliable seal between the piston and cylinder wall.

This set is intended for standard tension applications, which is a good choice for most general rebuilds. If you're looking for a solid set of piston rings that offer good wear resistance and a reliable seal, these Mahle rings are a popular option.