K&N Custom Racing Unique Oval Tapered Filter 17.313in OL B/7.75in OW B/14.625inOL T/6.125inOW T/9in - 100-8521 fits_2015-`BMW`X1AWD Now you need to go

Now you need to go all the way to ensure that your WRX is seeing maximum charge temp drops

It fits your A90 because it was built for your A90

CNC machined from 6061 T6 billet aluminum and black anodized with laser etched logos

disrupting your vehicle's durability and sound

The kit also contains air line

K&N Custom Racing Unique Oval Tapered Filter 17.313in OL B/7.75in OW B/14.625inOL T/6.125inOW T/9in - 100-8521 fits_2015-`BMW`X1AWD Now you need to goThis K&N racing air filter was designed to fit and seal onto the opening of an unmodified Enderle Birdcatcher fuel injection hat. Enderle Birdcatcher fuel injection hats are used in drag racing, on some monster trucks and on other racing vehicles. This high flow K&N air filter is washable and reusable. It adds little restriction while providing great air filtration. Features & Benefits Top plate, base plate and flange are all made from ultra light