What does GNS construction mean for these oil rings?

GNS stands for Gas Nitrided Steel. This treatment process hardens the surface of the steel, making the rings more resistant to wear and able to withstand the high temperatures and pressures found in racing engines.

What is the advantage of a 2.0mm oil ring width and .129-inch thickness?

These specific dimensions are chosen for optimal oil scraping and sealing in high-performance racing engines. The 2.0mm width helps manage oil flow effectively, while the .129-inch thickness ensures a solid seal against the cylinder wall under extreme operating conditions.

Can these rings be used in a street-driven vehicle?

These rings are specifically designed for NHRA Pro Stock racing and are not intended for street use. They are not CARB approved and may not meet emissions standards for regular vehicles.

Mahle NHRA Pro Stock Oil Ring Set 3030855B

Name: Mahle Rings Perf Oil Ring 4.755in x 2.0MM .129in RW GNS NHRA Pro Stock Plain Ring Set (48 Qty Bulk)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-perf-oil-ring-4-755in-x-2-0mm-129in-rw-gns-nhra-pro-stock-p-t14-48805
Price: 450.56 USD
Availability: BackOrder

Mahle Rings Perf Oil Ring 4.755in x 2.0MM .129in RW GNS NHRA Pro Stock Plain Ring Set (48 Qty Bulk)

$450.56

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 NHRA Pro Stock oil ring set. 4.755in x 2.0MM x .129in. Bulk 48 qty.

Key Features

Fits a 4.755-inch bore diameter.
Features a 2.0mm oil ring width and a .129-inch ring thickness.
Constructed from Gas Nitrided Steel (GNS) for improved durability and wear resistance.
Designed for NHRA Pro Stock racing applications.
Comes in a bulk pack containing 48 rings.
Not CARB approved; cannot ship to California.

This is a bulk set of 48 oil rings designed for specific high-performance racing applications. Check manufacturer specifications to confirm compatibility with your engine build.

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Product Details

Starting with a 4.755-inch bore diameter and a precise 2.0mm oil ring width, this Mahle OE set is built for serious performance applications, specifically NHRA Pro Stock racing. The .129-inch ring thickness is a key detail for managing oil control under extreme conditions. These rings are designed to handle the high demands of competition engines where precise oil management is critical for power and longevity.

Mahle OE is known for well-built engine components, and this Pro Stock oil ring set is no exception. The GNS (Gas Nitrided Steel) construction offers improved durability and wear resistance, which is essential when you're pushing an engine to its limits. This bulk pack of 48 rings means you'll have plenty on hand for multiple builds or for a shop that frequently works on high-performance racing engines. The plain ring design is straightforward and effective for its intended purpose.

When working with these specialized rings, ensure your cylinder bores are perfectly clean and within the specified tolerances. Proper installation is key to achieving optimal oil control and preventing premature wear. This set is intended for competition use and is not CARB approved, so it cannot be shipped to California.