What does the .017in Dykes design do?

The .017 inch Dykes design on these top piston rings is a specific profile that helps them seal tightly against the cylinder wall. This is important for maintaining proper compression and preventing oil from entering the combustion chamber.

Why are these rings not CARB approved?

These specific Mahle piston rings are not approved by the California Air Resources Board (CARB). This means they cannot be legally shipped to or installed on vehicles registered in California.

What is the PC479 designation?

The PC479 designation refers to a specific series or style of top piston ring offered by Mahle OE. It typically relates to the ring's material, face profile, and intended application, ensuring it works well with the piston and cylinder.

Mahle OE Piston Rings .017in Dykes PC479 3010236

Name: Mahle Rings 4.190in Bore Dia .017in Dykes PC479 Top Rings Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-4-190in-bore-dia-017in-dykes-pc479-top-rings-plain-ring-set-t14-51339
Price: 144.87 USD
Availability: BackOrder

Mahle Rings 4.190in Bore Dia .017in Dykes PC479 Top Rings Plain Ring Set

$144.87

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 feature .017in Dykes and a PC479 design for a 4.190in bore.

Key Features

Fits a 4.190 inch bore diameter.
Features a .017 inch Dykes design for improved sealing.
Part of the PC479 top ring series from Mahle OE.
Mahle OE is a popular brand for engine components.

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Product Details

These Mahle OE top piston rings are built with a .017 inch Dykes design, a specific feature that helps them seal effectively against the cylinder wall in a 4.190 inch bore. This type of ring is chosen for its ability to manage combustion pressure and oil control, which are critical for engine performance and longevity. Mahle is a well-known name in engine components, and these rings are made to their standards for a reliable rebuild.

The PC479 designation indicates a particular style of ring that Mahle uses, often related to the material composition and the specific profile of the ring face. This attention to detail in the design helps ensure a good match with the piston and cylinder, contributing to a solid seal. When you're rebuilding an engine, using well-made piston rings like these is essential for proper compression and to keep oil from entering the combustion chamber.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.