What is a Dykes style top ring and why is it used?

A Dykes style top ring has a tapered face. This design helps create a tighter seal against the cylinder wall as combustion pressure increases, which can improve combustion efficiency and reduce blow-by.

What does 'plain ring set' mean for the second ring?

A plain second ring typically refers to a ring with a rectangular cross-section, without special features like a tapered face or groove. This is a common and effective design for oil control in many engine applications.

Can these rings be shipped to California?

No, this product is not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle OE Piston Rings 3010237B - 4.255in Bore

Name: Mahle Rings 4.255in Bore Dia .017in Dykes PC479 Top Rings Plain Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-4-255in-bore-dia-017in-dykes-pc479-top-rings-plain-ring-set-t14-51252
Price: 966.80 USD
Availability: BackOrder

Mahle Rings 4.255in Bore Dia .017in Dykes PC479 Top Rings Plain Ring Set (48 Qty Bulk Pack)

$966.80

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 for 4.255in bore. .017in Dykes PC479 Top Rings. Bulk pack of 48.

Key Features

Fits engines with a 4.255-inch bore diameter.
Features a .017-inch Dykes style top ring for improved sealing under pressure.
Includes plain second rings for effective oil control.
Bulk pack contains 48 individual ring sets.
Mahle OE branded for reliable engine component replacement.
Not CARB approved; cannot ship to California.

This product is sold in a bulk pack of 48 and is designed for engines with a 4.255-inch bore. Please verify compatibility with your specific engine build.

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Product Details

If you're rebuilding the top end of an engine, getting the right piston rings is critical for sealing the combustion chamber and managing oil. This bulk pack of Mahle OE Top Rings is designed for a 4.255-inch bore, featuring a .017-inch Dykes style top ring profile. Mahle is a well-known name in engine components, and these rings are built to meet the demands of engine rebuilding.

These rings use a Dykes-style top ring, which has a tapered face. This design helps to create a tighter seal against the cylinder wall as cylinder pressure increases, improving combustion efficiency and reducing blow-by. The plain ring design for the second ring is a common and effective setup for many engine applications. This particular set comes in a bulk pack of 48, making it suitable for shops or projects requiring multiple sets of rings for various engines or a large quantity of a specific size.

When installing these rings, ensure you follow the manufacturer's recommended procedures for gapping and installation to achieve optimal performance and longevity. Proper installation is key to ensuring these rings seal effectively and prevent oil consumption. Remember that this part is not CARB approved and cannot be shipped to California.