K&N parts matching STP SA11421 air filter

The STP SA11421 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many STP air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
D. Bow, Chicago, Illinois
Had this in my last suv for some increased horsepower and gas mileage. Great product at a very reasonable price. Pays for itself.
Henry Ebright, Nottingham, Pennsylvania
Great air filter. Picked up 1.4 miles per gallon. Now running 26.4 miles per gallon. Was 25 in my sportage.
33-2469 K&N 33-2469 Replacement Air Filter
List Price: $75.99
Your Price: $48.99