What is the benefit of a low-tension piston ring?

Low-tension rings are designed to exert less pressure against the cylinder wall. This reduces friction, which can lead to improved engine efficiency and potentially a slight increase in power. They also help the ring conform better to the cylinder bore for a more consistent seal.

Why are the top rings moly-coated?

The Moly (molybdenum) coating on the top ring is a hard, wear-resistant surface. It helps the ring seat properly against the cylinder wall quickly and maintain that seal over the life of the ring, reducing wear on both the ring and the cylinder bore.

Are these rings suitable for all engine rebuilds?

These are Mahle Pro Series performance rings, designed for applications where durability and improved oil control are priorities. While they are a well-built option, always consult your engine build specifications to ensure they meet the requirements for your specific project.

Mahle Pro Series Piston Rings Moly 4.000 Bore 3150059.045

Name: Mahle Rings Pro Series Performance Rings Low Tension 4.000 Bore Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-pro-series-performance-rings-low-tension-4-000-bore-moly-ri-t14-47521
Price: 209.45 USD
Availability: BackOrder

Mahle Rings Pro Series Performance Rings Low Tension 4.000 Bore Moly Ring Set

$209.45

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle Pro Series Performance Rings for 4.000 bore engines. Features low tension, moly-coated top rings for improved durability.

Key Features

Fits engines with a 4.000 inch bore size.
Features low-tension top rings for reduced friction.
Top rings are coated with Moly for improved wear resistance and seating.
Designed for performance applications where oil control and durability are important.
Manufactured by Mahle OE, a well-known name in engine components.

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Product Details

These Mahle Pro Series piston rings feature a 4.000-inch bore size and a low-tension design, incorporating moly-coated top rings. This specific combination is chosen for its ability to reduce friction and improve oil control, which is crucial for engines that see regular use or are built for performance. The moly coating on the top ring is a well-known feature for its wear resistance, helping the ring seat properly against the cylinder wall and maintain a good seal over time.

Mahle has a strong reputation in engine components, and this Pro Series set is built with that in mind. The low-tension design helps the rings conform better to the cylinder bore, leading to a more consistent seal and potentially improved combustion efficiency. This is particularly beneficial in engines where precise control of blow-by and oil consumption is important. They are a solid option for engine rebuilds where reliability and performance are key considerations.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always ensure you are using the correct ring gap specifications for your specific application during installation, as this is critical for proper engine function and longevity.