What is the advantage of steel top rings with a moly coating?

Steel top rings offer greater strength and heat resistance than cast iron, which is beneficial in performance applications. The moly coating acts as a dry lubricant, reducing friction and wear, especially during the engine break-in period, and helps ensure proper ring seating against the cylinder wall.

What is included in this bulk pack?

This is a bulk pack containing 48 individual sets of Mahle Piston Rings, part number 3011205B. Each set is designed for a specific engine bore size and configuration.

Are these rings suitable for all engine builds?

These rings are specifically designed for performance engine builds where increased stress and heat are expected. While they offer improved durability, it's crucial to ensure they match your engine's bore size and that the ring gaps are set correctly according to your application's specifications for optimal performance and longevity.

Mahle Piston Rings 3011205B - Moly Ring Set

Name: Mahle Rings Performance HV385 Steel Top 3.759 x 1.2MM .133RW Moly Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-performance-hv385-steel-top-3-759-x-1-2mm-133rw-moly-ring-s-t14-48549
Price: 604.52 USD
Availability: BackOrder

Mahle Rings Performance HV385 Steel Top 3.759 x 1.2MM .133RW Moly Ring Set (48 Qty Bulk Pack)

$604.52

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, part# 3011205B. Steel top rings with moly coating for improved durability. Bulk pack of 48 sets.

Key Features

This is a bulk pack containing 48 sets of piston rings.
The top rings are constructed from steel for improved strength and heat resistance.
Features a moly coating on the top rings to reduce friction and aid in break-in.
Ring dimensions are 3.759 inches bore size, with a 1.2mm top ring groove and a 0.133-inch (3.4mm) oil ring width.
Designed for performance engine builds where durability and sealing are paramount.

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Product Details

If you're rebuilding the engine in a performance application, getting the piston ring setup right is critical for sealing and power. This Mahle OE Moly Ring Set is designed for those demanding builds where reliability and consistent performance are key. These aren't your average rings; they're built to handle the extra stress and heat that comes with performance engines.

What sets these rings apart is the construction. The top rings are made from steel, which offers better strength and heat resistance compared to cast iron, especially important when you're pushing an engine harder. They also feature a moly coating, a dry lubricant that helps reduce friction and wear during the critical break-in period and beyond. This moly coating is particularly beneficial for preventing scuffing and ensuring the rings seat properly against the cylinder wall, which is essential for good compression and oil control. This bulk pack of 48 sets means you'll have plenty on hand for multiple engine builds or for a shop that frequently works on performance applications.

When installing these rings, pay close attention to the ring gap specifications for your specific application. Proper gapping is crucial for performance and longevity, especially with steel top rings. Ensure your cylinder walls are properly honed to match the ring type and application for optimal performance and break-in. This set is a solid choice for anyone serious about building a reliable, high-performing engine.