K&N Universal X-Stream Clamp-On Air Filter 3-5/16in Flange 4-7/8in Base 4in Top 4-1/4in H - Single

SKU: knnRX-4120-1 UPC: 24844093943
Backordered – call for lead time

⚠ Call for Availability

Expected ship time: usually within 24–48 hours; some vendor items may take longer.

Call: (503) 235-1947 | Email Us: info@dfispdx.com

Regular price $146.99

Have a question about this part? We'll answer it.

Verified Fitment & Application Support

This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.

This round tapered K&N filter clamps onto a 3-5/16in inlet and is listed by size, not by vehicle. It uses washable, reusable oiled cotton media.

Key Features

  • Molded rubber flange absorbs vibration and stretches up to 1/16in (1.5mm) to fit in-between sizes
  • Filtering top adds media area for higher airflow and a longer service interval
  • Washable and reusable

Fitment

This filter is not vehicle specific. Compare the dimensions below with your intake tube and under-hood clearance.

Product Details

  • Brand: K&N Engineering
  • Manufacturer Part Number: RX-4120-1
  • Flange ID: 3-5/16in
  • Base OD: 4-7/8in
  • Top OD: 4in
  • Height: 4-1/4in
  • Filter media: oiled cotton

Orders typically ship within 24–48 hours of being received, but because of vendor shipping times some orders may take longer. We ship within the United States only (48 contiguous states plus DC).

Shipping Height: 7.0

Shipping Length: 7.5

Shipping Width: 7.0

California Proposition 65
WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.