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 2008 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:
"I have K&N filters on all my vehicles. I just put one on my new(for me) 2008 WRX Sti. Lets the car breath better. I tend to keep my vehicles for a long time. It will certanly pay for itself. I put it on as soon as I puchesed the car so I can't speak to a mpg gain, but K&N filters have given me a 1-2 mpg gain on my other vehicles (and a little performance boost too)so I guess this application would be no different." —Brian K from Greensboro, NC bought a K&N Air Filters for a 2008 Subaru Impreza.
"Difference noticed as soon as it was installed. I was at 20.1 miles per gallon now 20.7 with daily driving a mix of highway and street. We shall see if that keeps after its first wash." —James S from Williamstown, NJ bought a K&N Air Filters for a 2008 Subaru Impreza, 2.5L 4-cyl. engine.
"I ordered a K&N air filter and treatment kit for my '08 Subaru Impreza. Also picked up a set of E3 spark plugs to improve fuel efficiency. I prepared the filter with the oil treatment as the instructions showed and installed the filter after changing the spark plugs. I can tell a big difference in low end acceleration and will see how the fuel ecconomy improves. K&N has a great product." —John G from N Richland Hills, TX bought a K&N Air Filters for a 2008 Subaru Impreza.
"The K&N filter fit right into the factory airbox, hopefully i can gain 1-2mpg." —Sean D from Billerica, MA bought a K&N Air Filters for a 2008 Subaru Impreza, 2.5L 4-cyl. engine.
"WOULD NOT DRIVE A CAR THAT DOES NOT HAVE A K & N AIR FILTER IN IT. IT IS THE BEST AND GET IMPROVED GAS MILEAGE." —Joseph G from Cedar Rapids, IA bought a K&N Air Filters for a 2008 Subaru Impreza, 2.5L 4-cyl. engine.
"The shipping was fast and the products were easy to install. They came separately but with one day a part. Pretty awesome." —Yeong K from Mount Laurel, NJ bought a K&N Air Filters for a 2008 Subaru Impreza.