K&N 2019 WRX STI 2.5L F/I Replacement Air Filter | knn33-5092

K&N’s replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

Fitment:

2019-2021 Subaru WRX STI Base H4.2458cc 

2019-2021 Subaru WRX STI Limited H4.2458cc 

2019 Subaru WRX STI S209 H4.2458cc