K&N Engineering 33-5092 High-Flow Replacement Air Filter for 2019–2021 Subaru WRX STI

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! K&N's replacement High-Flow Air Filters are designed to increase horsepower while providing exceptional engine protection, and are covered by K&N's No-Hassle Lifetime Limited Warranty. Associated products: 99-5000 Filter Care Service Kit Aerosol

• REDUCES WASTE: Over 200 million disposable air filters and their packaging waste wind up in landfills each year- reusable filters help reduce waste in our landfills
• Million Mile Limited Warranty

Upgrade your vehicle’s factory air intake system with the K&N Engineering 33-5092 High-Flow Replacement Air Filter. Designed as a direct drop-in replacement for the original equipment filter, it installs into the factory air box without requiring permanent modifications. Its layered, oiled cotton media is engineered to improve airflow while capturing contaminants, helping support responsive engine performance and dependable protection.

The reusable K&N 33-5092 air filter is designed to last for the life of your vehicle when properly maintained, reducing the need for repeated disposable filter replacements and helping minimize landfill waste. The washable construction can be cleaned and re-oiled with the appropriate K&N Filter Care Service Kit, including the 99-5000 aerosol kit. K&N backs this filter with a 10-Year/Million Mile Limited Warranty, providing long-term value and confidence.

Key Product Specifications and Technical Data

• Brand: K&N Engineering
• Part Number: 33-5092
• Product Type: High-flow replacement engine air filter
• Filter Media: Layered, oiled cotton
• Installation: Direct drop-in replacement for the factory air box
• Maintenance: Washable and reusable with proper cleaning and re-oiling
• Warranty: 10-Year/Million Mile Limited Warranty
• Vehicle Application: 2019–2021 Subaru WRX STI

What’s Included

• One K&N Engineering 33-5092 High-Flow Replacement Air Filter

This automotive replacement air filter is intended for compatible 2019, 2020, and 2021 Subaru WRX STI applications. Verify vehicle fitment and engine configuration before installation. This product is not CARB approved where applicable and may not be legal for use on pollution-controlled vehicles in certain jurisdictions.

Features:

• Improved Airflow: Layered, oiled cotton media is engineered to support increased airflow and responsive engine performance.
• Reusable Construction: Washable and reusable design helps reduce the waste associated with disposable air filters.
• Engine Protection: Multi-layer filter media helps capture contaminants before they reach the engine.
• Easy Installation: Direct drop-in design fits the factory air box without permanent modifications.

Fitments:
2019 Subaru WRX STI Base
2019 Subaru WRX STI Limited
2019 Subaru WRX STI S209
2020 Subaru WRX STI Base
2020 Subaru WRX STI Limited
2021 Subaru WRX STI Base
2021 Subaru WRX STI Limited

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1