Skip to content
Enhanced airflow and filtration for superior engine performance.
The K&N XStream Washable Air Filter is designed to improve engine performance by increasing airflow and filtration efficiency. Featuring a unique filter within the filter's top, this design maximizes filter area, allowing for higher air flow and extended service intervals. Constructed from durable cotton gauze, the filter is both washable and reusable, making it a sustainable choice for automotive enthusiasts.
With a round shape and dimensions of 4 inches in outside diameter and 5-3/4 inches in height, the K&N XStream filter fits a variety of applications. The ultra-strong molded pliable rubber flanges provide a secure attachment while absorbing vibrations, ensuring a stable fit. This filter is engineered to meet the demands of racing environments, delivering the protection and airflow necessary for optimal engine performance.
K&N's commitment to quality is evident in the design of the XStream air filter, which is oiled for enhanced filtration. The red cotton gauze element not only looks appealing but also contributes to the filter's efficiency. This product is an essential component for those seeking to enhance their vehicle's performance through improved air intake.
Features
- 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
- 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 Which K&N Delivers
- All K&N Universal Air Filters Are Constructed With Ultra Strong Molded Pliable Rubber Flanges
- K&N Universal Air Filters Are Washable And Reusable
Specifications
- Manufacturer: K & N Filters
- Manufacturer Part Number: RX-4140
- Shape: Round
- Type: Washable
- Height (IN): 5-3/4 Inch
- Length (IN): Not Applicable
- Width (IN): Not Applicable
- Base Dimensions (IN): 4 Inch Diameter
- Top Dimensions (IN): 4 Inch Diameter
- Oiled: Yes
- Element Color: Red
- Element Material: Cotton Gauze
- Flange Inside Diameter (IN): 3-1/2 Inch
- Flange Length (IN): 3/4 Inch
- Flange Angle (DEG): 0 Degree
- Flange Offset (IN): 0 Inch
- Cap Finish: Without Cap
- Cap Color: Without Cap
- Cap Material: Without Cap
- Includes Gasket: No
- Estimated Install Time (Hours): 0.5
Technical Documents
Product Videos
Shipping & Returns
- This product ships within the continental USA only.
- This product typically ships within 1 to 3 business days.
- Returns are accepted within 30 days for items in like-new condition. For complete details, please see our return policy.
