K&N Engine Air Filter KNA-2456 — Long-Life 18,000-Mile Replacement for Nissan/Infiniti, High Airflow & OEM Fit

K&N Engine Air Filter KNA-2456 is a long-life replacement air filter engineered to deliver up to 18,000 miles of reliable engine protection and high airflow in compatible Nissan and Infiniti vehicles.

Designed from the brand that has led high-flow filtration since 1969, this K&N Advantage Plus filter combines durable construction with premium synthetic or cellulose-blend media to balance protection and performance. It installs quickly into the factory air box and is built to meet or exceed OEM fit and filtration expectations for the listed applications, offering a longer service interval than many disposable filters.

How does the K&N KNA-2456 improve everyday engine protection?

The KNA-2456 uses tightly controlled filter media to trap contaminants while supporting steady airflow to the engine. It’s engineered for up to 99% filtration efficiency (media dependent by application) so the engine breathes cleaner air over longer intervals.

• Premium synthetic or cellulose-blend media catches fine particles.
• Engineered pleat geometry increases surface area for filtration.
• Meets or exceeds OEM specifications for fit and sealing.
• Durable frame resists deformation over service life.

How long will this filter last and when should I replace it?

This K&N long-life filter is specified for replacement every 18,000 miles under normal highway driving conditions, which extends service life roughly 50% beyond standard 12,000-mile disposable filters. Replace sooner if you drive regularly in dusty or severe environments.

• Replace every 18,000 miles during normal use.
• Shorten interval in heavy dust, off-road, or severe climates.
• Check the filter visually during routine maintenance.
• Swap with the same K&N part number for consistent performance.

Is the KNA-2456 easy to install in my Nissan or Infiniti?

Yes—installation is straightforward. The KNA-2456 is designed to drop into the factory air box and usually requires no special tools, making it a quick maintenance task you can complete in minutes.

• Direct-fit replacement for compatible models—no trimming required.
• Typical install time: a few minutes for most users.
• Factory sealing surfaces preserved for proper fit and filtration.
• Follow vehicle manual or simple online guides for steps.

What performance trade-offs should I expect compared to OEM disposable filters?

This long-life K&N filter emphasizes extended service life and airflow while maintaining high filtration efficiency. Users typically find fewer filter changes are needed, with performance comparable to or better than many original equipment disposable filters, but filter choice should match driving conditions.

• Up to 50% longer service life versus typical 12,000-mile filters.
• Designed to maintain engine airflow without sacrificing protection.
• Media varies by application—synthetic or cellulose-blend options.
• Visually inspect in severe conditions; replace earlier if needed.

Who is this for? The K&N KNA-2456 is aimed at owners of compatible Nissan and Infiniti models who want a dependable, longer-interval replacement that balances filtration efficiency with airflow. It’s a good fit for drivers seeking reduced maintenance frequency, straightforward installation, and a product built to OEM fitment standards. If you frequently drive in dusty conditions, consider inspecting the filter more often or choosing a service interval to match your environment.