What is the purpose of the moly coating on these piston rings?

The moly coating on these Mahle piston rings helps to reduce friction between the ring and the cylinder wall. This leads to improved durability and a smoother break-in process for your engine.

Are these piston rings a direct replacement for all engines with a 4.075-inch bore?

While these rings fit a 4.075-inch bore, they are specifically designed for performance applications. You should always verify that the ring thickness and oil ring dimensions match your specific piston and engine build requirements.

What does 'Not CARB approved' mean for shipping?

This means the product does not meet California Air Resources Board emissions standards. Consequently, it cannot be legally shipped to California addresses.

Mahle OE Piston Rings 3011274 - Performance Steel

Name: Mahle Rings Performance 9254 Steel HV312 UCR 4.075in x .0625in .190in RW Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-performance-9254-steel-hv312-ucr-4-075in-x-0625in-190in-rw--t14-48734
Price: 159.73 USD
Availability: BackOrder

Mahle Rings Performance 9254 Steel HV312 UCR 4.075in x .0625in .190in RW Moly Ring Set

$159.73

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 Rings. Moly coated for improved durability and performance.

Key Features

Fits a 4.075 inch cylinder bore.
Top ring is 0.0625 inches thick.
Oil ring is 0.190 inches thick.
Features a moly coating for reduced friction and improved wear resistance.
Constructed from durable steel for long-lasting performance.
Designed for performance engine rebuilds and high-demand applications.

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Product Details

If you're rebuilding the engine in your classic muscle car or a high-performance build, getting the right piston rings is crucial for sealing and power. This Mahle OE Moly Ring Set is built for those situations where you need reliable performance and durability. These rings are made from steel and feature a moly coating, which helps reduce friction and wear, especially during the critical break-in period and under demanding use.

The HV312 UCR design is a popular choice for many performance applications, offering a good balance of sealing and oil control. With a 4.075-inch bore size, these rings are designed to fit specific pistons, ensuring a tight seal against the cylinder wall. The .0625-inch top ring and .190-inch oil ring dimensions are standard for many performance builds, contributing to efficient combustion and proper oil management.

Remember, these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for installation procedures and break-in recommendations to ensure optimal performance and longevity.