Keep your motor’s lungs fed with clean, energy-rich oxygen from the “the world’s best air filter”—K&N Air Filters. Constructed from pleated sheets of oiled cotton gauze, these air filters strip away grime without blocking airflow. Fully reusable. Million Mile Limited Warranty.
Say goodbye to the days of re-oiling your reusable performance filter—innovative aFe Pro-Dry S Air Filters boast a 100% oil-free cotton gauze construction for wicked airflow. Easy to clean and reuse. The Pro-Dry S Air Filter is backed by a Lifetime Warranty.
Steer clear of oil-soaked upgrades and make the switch to AEM DryFlow Air Filters. Boasting an oil-free polyester synthetic material, these performance air filters ensure ample airflow, enhanced protection and easy maintenance. Custom sized. Lifetime Limited Warranty.
When you equip your engine bay with an aFe Air Filter, you’ll never need another performance air filter in your ride’s life. aFe expertly crafts your automotive air filter from high-quality cotton gauze to trap grime without blocking airflow. Cleanable and reusable. Lifetime Warranty.
Not sure which 2011 Subaru Impreza Air Filters - Custom Fit is right for you? We have over 14143 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Found out about aFe filters recently and bought one for my 2011 Subaru Impreza. The filter fit like a glove and has an excellent seal. The gas mileage was averaging 27-30mpg before the filter. With the aFe filter installed the average is 33-34mpg and improved throttle response. Very similar to the K&N filter in my Saab 9-3 but without the oil!!" —Brian H from Woodland, MI bought an aFe Pro-Dry S Air Filters for a 2011 Subaru Impreza, 2.5L 4-cyl. engine.
"Have used K&N filters on my cars and motorcycles for years. I can't say that I have ever realized a dramitic change in performance or mileage by just adding the air filter, but it is one of several things you do to maximize perfromance and I think that the combination of a high flow air intake and a good exhaust system makes a difference." —Robert O from Superstition Mountain, AZ bought a K&N Air Filters for a 2011 Subaru Impreza.
"Since I was a kid I have been using K&N filters in everything from 3 wheelers to 4 wheelers to jet skis to dirt bikes to street bikes and know its the first thing I buy for every new vehicle I get. What an amazing product! Keep up the good work!" —Michael B from Naples, FL bought a K&N Air Filters for a 2011 Subaru Impreza, 1.4L 4-cyl. engine.
"K&N filters are the best !! Have used it on my cars and on my brother's motorcycles." —Eyhab J from Germantown, MD bought a K&N Air Filters for a 2011 Subaru Impreza, 2.5L 4-cyl. engine.