Compatible: (2.5L)
2019 – 2021 Subaru WRX STI
Subaru OEM #:16546AA180
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N’s 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N’s most popular product!
- Designed to increase horsepower
- Washable, reusable, and engineered to last for the life of your vehicle
- Designed to provide high airflow and exceptional filtration
- Engineered to fit easily into your factory air box
- 10-Year/Million Mile Limited Warranty
- Only needs cleaning every 50,000 miles under normal highway driving conditions
- Emissions legal in all 50 States
- Will not void vehicle warranty
| Air Filter Shape |
Panel |
| Air Filter Material |
Cotton Gauze |
| Washable |
Yes |
| Height |
1.563 in (40 mm) |
| Outside Length |
9.063 in (230 mm) |
| Outside Width |
8.406 in (214 mm) |
| Package Contents |
1 Air Filter |
| Package Quantity |
1 |
| Warranty |
1,000,000 Miles/10 Year |
| Product Style |
Panel Air Filter |
| Weight |
1.3 lb (0.6 kg) |
| Filter Re-Oiling Amount |
1.38 oz (41 ml) |
| Product Box Height |
11.59 in (294 mm) |
| Product Box Length |
10.47 in (266 mm) |
| Product Box Width |
1.75 in (44 mm) |
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&Ns 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&Ns most popular product!
- Designed to increase horsepower
- Washable, reusable, and engineered to last for the life of your vehicle
- Designed to provide high airflow and exceptional filtration
- Engineered to fit easily into your factory air box
- 10-Year/Million Mile Limited Warranty
- Only needs cleaning every 50,000 miles under normal highway driving conditions
- Emissions legal in all 50 States
- Will not void vehicle warranty
- Durable Urethane Panel Construction– Made to last the life of your vehicle.
- Pleated High Flow Filter Media– Improves performance by allowing more air into your engine.
- Epoxy Coated Aluminum Mesh– Helps protect filter media.
- Pre-Oiled Cotton Gauze– Ready to install out of the box.
- Designed for Optimal Seal– Prevents unfiltered air from passing through.
Filtration & Engine Protection
K&N automotive filters offer an optimal blend of high air flow, filtration efficiency, durability and dust capacity. K&N high flow filter media has been tested in our own in-house laboratories and by independent labs using the ISO5011 air filtration standard developed by the Society of Automotive Engineers. Our goal at K&N is to design reusable filters with the most possible airflow while providing guaranteed engine protection.
Fuel Economy
Fuel economy testing and mileage claims are not as cut and dry as they may seem. The EPA’s website states, “EPA’s fuel economy estimates are designed to allow consumers to comparison shop. Your fuel economy will almost certainly vary from the EPA’s fuel economy rating. This is based on a number of factors, such as weather, road conditions, your driving and maintenance habits, and your use of air conditioning.” Many exaggerated claims are found in the marketplace by automotive product manufacturers claiming to improve vehicle gas mileage. K&N does not make any general fuel economy claims. We simply encourage you to try our washable filter products for yourself.
K&N Air Filter Oil
A K&N reusable filter is designed with four to six layers of cotton gauze media sandwiched between two aluminum wire screens. The cotton media is then treated with a specially formulated grade of filter oil that causes tackiness throughout the cotton’s microscopic strands. The cotton in a K&N replacement air filter allows high volumes of airflow, and when combined with the tackiness of the filter oil creates an efficient filtering media that ensures engine protection.
K&N Consumer Protection
The K&N Consumer Protection Plan goes a step further than the K&N Million Mile Limited Warranty. At times, the performance aftermarket has been plagued by automotive manufacturers and auto dealers that may attempt to discourage you from modifying your vehicle. They would prefer that you buy OE parts and not customize your car or truck and have even voided their own manufacturer’s warranty due to vehicle modifications. K&N and the Magnuson-Moss Warranty Act protect consumers from such denied warranty claims. When you buy a K&N OE replacement filter orair intake systemyou can be confident your vehicle’s warranty will remain in effect. If you encounter a dealership that wants to void your warranty because of one of our products, K&N will resolve the issue so you won’t have to. We believe K&N makesThe World’s Best Air Filterand we stand behind that claim 100 percent.
Consumer Protection Pledge
K&N pledges to our customers that they will not be taken advantage of and charged for a repair due to a dealership warranty denial blamed on the presence of a K&N product.
Warranty:
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