K&N parts matching Ford 4R3U9601AB air filter

The Ford 4R3U9601AB air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Ford air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Gary Lewis, Ballwin, Missouri
The K&N filter is far superior to my OE filter. My Mustang runs smoother now.
Adam Weisgerber, Middletown, Michigan
No noticeable performance difference.
David Lindsell, North Potomac, Maryland
This is my second car that I have installed a K&N Air Filter on.  The engine breathes easier and quickly reaches higher rpm's when needed, and helps to increase gas mileage and power.  Like the fact that the Air Filter pays for itself because of its long service.
33-2298 K&N 33-2298 Replacement Air Filter
List Price: $78.49
Your Price: $50.99