K&N 33-2304 Engine Air Filter

Reliable Engine Air Filter for Subaru Vehicles

The K&N 33-2304 replacement air filter is designed to provide consistent airflow and filtration for select Subaru models. Engineered with cotton gauze material and a flexible frame, this panel air filter supports engine performance and longevity.

• High-performance cotton gauze air filter material
• Panel-shaped design with flexible frame for easy fitment
• Pre-oiled filter requiring 1.06 oz (31 ml) re-oiling amount
• Washable and reusable for extended service life
• Dimensions: 8.75 in length x 8.563 in width x 0.938 in height
• Compatible with multiple Subaru models including Forester, Outback, WRX, and more
• Backed by a 1,000,000 mile/10 year warranty

Product Details and Specifications

The K&N 33-2304 engine air filter features a panel design constructed from multiple layers of cotton gauze, which allows for efficient airflow while capturing contaminants. The flexible frame design ensures a secure fit within the airbox of compatible Subaru vehicles. This filter comes pre-oiled, simplifying initial installation and maintenance. It is washable and reusable, reducing the need for frequent replacements. The compact dimensions (8.75 inches in length, 8.563 inches in width, and 0.938 inches in height) make it suitable for a range of Subaru models including the B9 Tribeca, Crosstrek, Forester, Impreza, Legacy, Outback, Tribeca, WRX, WRX STI, XV, and XV Crosstrek.

Compatible Subaru Models and Applications

• Subaru Forester engine air filter replacement
• Subaru Outback air filter upgrade
• Subaru WRX and WRX STI performance air filter
• Subaru Crosstrek and XV Crosstrek air filtration
• Subaru Legacy and Impreza air filter maintenance

Installation Notes and Tips

When installing the K&N 33-2304 air filter, ensure the airbox is clean and free of debris before placement. The flexible frame allows for a snug fit, but verify the filter seats properly to avoid unfiltered air bypass. Since the filter is pre-oiled, no additional oiling is required at installation; however, periodic cleaning and re-oiling are recommended to maintain optimal performance.

Quality Assurance and Warranty

K&N provides a 1,000,000 mile or 10-year warranty on the 33-2304 air filter, reflecting confidence in its durability and filtration capabilities. This warranty covers defects in materials and workmanship, supporting long-term use in Subaru vehicles.