What is the purpose of the nitride coating on the top ring?

The nitride coating on the top compression ring is applied to enhance durability and reduce friction. This helps the rings withstand higher temperatures and pressures in performance engines while maintaining a good seal.

Are these piston rings compatible with pistons other than HKS N15?

These piston rings are specifically designed to work with HKS N15 pistons. Using them with other piston brands may result in improper fitment and compromised engine performance.

What does 'Not CARB approved' mean for shipping?

This means the product does not meet the emissions standards set by the California Air Resources Board (CARB). As a result, it cannot be legally shipped to California for use on vehicles registered in that state.

HKS Piston Ring Set N15 21005-AN015

Name: HKS PISTON RING SET N15
Brand: HKS
SKU: hks-hks-piston-ring-set-n15-t14-113053
Price: 490.33 USD
Availability: BackOrder

HKS PISTON RING SET N15

$490.33

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

HKS N15 Piston Ring Set. Built for performance engine builds.

Key Features

Fits HKS N15 pistons for a precise engine build.
Features a nitride coating on the top compression ring for improved durability.
Designed to provide optimal sealing for efficient combustion.
Constructed with high-strength materials for performance applications.
Not CARB approved; cannot ship to California.

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Product Details

The HKS N15 Piston Ring Set features a unique nitride coating on the top compression ring, a design choice that helps improve durability and reduce friction in high-performance engine applications. These rings are crafted to work with HKS's N15 pistons, ensuring a precise fit and optimal sealing within the cylinder bore. When you're rebuilding the top end of an engine for increased power or reliability, the quality of your piston rings is critical for maintaining compression and managing oil consumption.

This set is constructed with high-strength materials to withstand the increased pressures and temperatures found in modified engines. The careful engineering behind these rings aims to provide a solid seal between the piston and cylinder wall, which is essential for efficient combustion and preventing blow-by. HKS has a long history of developing performance engine components, and this piston ring set reflects that experience, offering a well-built option for enthusiasts looking to get the most out of their engine build.

It's important to note that this product is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures when working on your engine.