K&N Engineering RX-4990 XStream Top Universal Clamp-On Air Filter

K&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. The XStream Air Filter provides awesome air flow and outstanding filtration. When racing, in any environment, racers need all the protection and airflow they can get. K&N delivers. All K&N universal air filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable. K&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. Associated products: RX-4990DK Air Filter Wrap, RX-4990DL Air Filter Wrap, RX-4990DR Air Filter Wrap, RX-4990DY Air Filter Wrap, 99-5000 Filter Care Service Kit Aerosol

• Clamp On Design
• Clamp-on design

Brief Description: The K&N Engineering RX-4990 XStream Top Universal Air Filter is designed to increase airflow while providing dependable engine protection in demanding automotive and racing applications. Its XStream top incorporates an additional filter element within the filter lid, increasing the available filter area to support high airflow and extended service intervals. The clamp-on design fits a 3-inch intake flange and is suitable for custom intake systems and select applications.

Key Product Specifications & Technical Data:

• Brand: K&N Engineering
• Part Number: RX-4990
• Filter Type: XStream Top universal air filter
• Installation: Clamp-on intake design
• Flange Size: 3 inches
• Base Diameter: 6 inches
• Top Diameter: 5 inches
• Filter Height: 5 9/16 inches

Performance and Construction: The RX-4990 uses K&N’s washable and reusable filter media to deliver outstanding filtration while maintaining strong airflow. Its ultra-strong, pliable molded rubber flange absorbs vibration and provides a secure connection to the intake tube. The flange can stretch slightly to accommodate minor fitment differences, helping the filter fit applications that fall between standard intake sizes. This construction is well suited for performance vehicles, custom builds, and racing environments where airflow and filtration are both important.

Fitment: This universal air filter is listed for use with the 2005 Ford Focus, including multiple configurations. Verify intake flange size, clearance, and application requirements before installation. The K&N Engineering RX-4990 is not CARB approved, and applicable emissions regulations should be reviewed before use on street-driven vehicles.

What’s Included: One K&N Engineering RX-4990 XStream Top universal clamp-on air filter. Compatible accessories include K&N RX-4990DK, RX-4990DL, RX-4990DR, and RX-4990DY air filter wraps, along with the 99-5000 Filter Care Service Kit Aerosol.

Features:

• XStream Top Design: Adds a filter element within the top of the air filter for increased filter area, improved airflow potential, and longer service intervals.
• High-Flow Filtration: Provides strong airflow and dependable engine protection for performance, custom, and racing applications.
• Washable and Reusable: K&N filter media can be cleaned and serviced for continued use, reducing the need for frequent replacement filters.
• Flexible Clamp-On Flange: The pliable molded rubber flange absorbs vibration, secures the filter to the intake, and can accommodate slight fitment differences.

Fitments:
2005 Ford Focus ZX3
2005 Ford Focus ZX4
2005 Ford Focus ZX5
2005 Ford Focus ZXW

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