K&N Engineering XStream Air Flow Top Assembly 66-3040

Not only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and reusable, the XStream Air Flow Top filter delivers the best protection available for your engine. Cleanable and reusable, the XStream Air Flow Top adds filter area and longer service intervals while delivering excellent filtration. Associated products: E-1650 Replacement Air Filter, 99-5000 Filter Care Service Kit Aerosol

• Washable and reusable
• Improves Air Flow

The K&N Engineering XStream Air Flow Top Assembly 66-3040 is designed to improve airflow efficiency in compatible air filter applications. Its unique design redirects incoming air through the filter’s side pleats, helping increase the available filtration area while supporting consistent engine performance. The assembly is engineered for automotive use and pairs with the K&N XStream air filtration system.

Washable and reusable, the K&N XStream Air Flow Top helps extend service intervals and reduce replacement filter waste. The durable construction provides excellent filtration and engine protection while allowing the filter to be serviced and returned to use. This assembly is intended for applications using a 14-inch outside diameter filter with a 5.125-inch neck flange and a 3.063-inch height. Associated products include the K&N E-1650 replacement air filter and 99-5000 Filter Care Service Kit Aerosol.

Important fitment and compliance information: Verify the filter and intake assembly requirements before installation. This product is not CARB approved, and applicable emissions regulations should be reviewed before use. The supplied unit is intended for automotive applications and includes one XStream Air Flow Top Assembly.

Key Product Specifications & Technical Data

• Brand: K&N Engineering
• Part Number: 66-3040
• Product Type: XStream Air Flow Top Assembly
• Application: Automotive air filtration
• Filter Outside Diameter: 14 inches
• Neck Flange Diameter: 5.125 inches
• Assembly Height: 3.063 inches
• Service Type: Washable and reusable

What’s Included

• One K&N Engineering XStream Air Flow Top Assembly

Features:

• Airflow Efficiency: Redirects incoming air through the filter’s side pleats to help draw more air into the filtration media.
• Increased Filter Area: Adds usable filtration area to support airflow and performance efficiency.
• Washable and Reusable: Can be cleaned and serviced for extended use and longer replacement intervals.
• Engine Protection: Provides excellent filtration to help protect compatible automotive engines from airborne contaminants.

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