Why Upgrade to the K&N KNA-5064?
Because your boxer engine already works hard enough—no need to suffocate it.
K&N’s high-flow cotton gauze design allows more air into the engine compared to traditional paper filters, helping improve acceleration, responsiveness, and overall efficiency. Plus, it’s reusable—so you stop buying throwaway filters every year like it’s a subscription service.
K&N Performance Air Filter
K&N has been the #1 Brand in Performance Air Filtration since 1969, bringing you the best in performance and protection for whatever you drive. Offering a long-life solution for every driver, K&N’s performance technology is now available in a premium 18,000 Mile filter to provide you extended life compared to traditional 12,000 Mile disposable filters. With a premium synthetic or cellulose blend filter media, based on application, these filters provide up to 99% engine protection for your vehicle. They are designed to meet or exceed OEM specifications and will install easily into your factory air box in minutes.
Features:
- Premium 18,000-mile filter life
- Up to 99% engine protection
- Designed to meet or exceed OEM specifications
- Easy installation in minutes
Compatible Vehicles:
- 2019-2024 SUBARU Ascent
- 2018-2024 SUBARU Crosstrek
- 2019-2025 SUBARU Forester
- 2019-2024 SUBARU Impreza
- 2020-2025 SUBARU Legacy
- 2020-2025 SUBARU Outback
- 2022-2024 SUBARU WRX
- 2019-2022 SUBARU XV
From the manufacturer
Vehicle Fitment
The K&N KNA-5064 fits a wide range of Subaru models with H4 engines:
- Subaru Ascent (2019) – 2.4L Turbo
- Subaru Crosstrek (2016–2019) – 2.0L
- Subaru Forester (2016–2018) – 2.0L / 2.5L
- Subaru Impreza (2016–2019) – 2.0L
- Subaru XV Crosstrek (2016–2017) – 2.0L
Always verify your exact model and engine—Subaru loves subtle changes almost as much as head gaskets.
Why It Matters
A restrictive air filter can limit airflow and reduce engine efficiency. Upgrading to the K&N KNA-5064 provides:
- Better airflow for improved performance
- Long-term cost savings with reusable design
- Reduced waste compared to disposable filters
It’s one of the simplest ways to give your engine a little breathing room without diving into full intake systems.
Installation Made Easy
- Open your airbox
- Remove the old paper filter (RIP)
- Drop in the K&N KNA-5064
- Close it up and enjoy slightly happier engine noises
No tools. No tuning. No regrets.
Final Verdict
The K&N KNA-5064 is a solid upgrade for Subaru owners who want better airflow and long-term value. It’s not a full performance intake—but it’s a noticeable step up from stock.
Reusable, reliable, and actually worth it.
Sam E –
Good product, not much to say. The product arrived quickly, looks to be of high quality construction, fit perfectly and took me only a couple of minutes to install. I love it when a product is no frills and delivers as advertised. I’ve used various filters from K&N before and have always had very good success with them so I will be buying more of these for sure when the time comes.
Ronald Ryan Miller –
Arrived fast, not damaged, fit great
Brian H. –
My college- agreed daughter drives her Subaru through all sorts of off-road environments as an Environmental Biologist. I trust these filters more than any other in the market to keep her engine in top condition. Spend the few extra bucks and get these ones that will last long after the cheapies fail.
muzixplorer –
Great replacement filter that takes only minutes to install. Save major $$$ by doing it yourself. If you aren’t sure how to install it, there are videos showing how easy it is on YT.
Outdoorsman –
Works great.
Little Oak –
Higher quality than OEM item fit and arrived on time. This was for a 2023 Subaru Outback
Gahvno –
Last December we bought our first new car in 21 years and the first thing I did is stock up on cabin and engine air filters. I’ve got nothing against dealership OEM parts and pieces but what I do have an issue with is the prices. Luckily, we all have a bit of control over access to OEM quality parts and pieces at significantly more reasonable prices via Amazon. This filter and it’s matching cabin filter are excellent in value and take less than 5 minutes to replace. Compare that to paying the hourly rate at your dealer plus the dealership retail price and you’ll do what I did and stock up on these two filters. Definitely recommended.
Luke –
Fits great replacing my stock air filter
Lance T –
Fits 2018 Subaru Impreza
It’s a K&N air filter made in China.
Joanna Arseneault –
Doesn’t fit 2017 forester
Doesn’t fit 2017 forester