Also, a K&N drop in filter is a fairly inexpensive ($40) performance mod you can do to the car that should take less then 5 minutes to install. The filters are washable so you would never have to buy another one and can just wash it about every 50,000 miles. When my room mate bought a 2015 CR-Z, i took off the airbox cover and discovered that the air filter was completely filthy. I just gave him my drop in filter with about 10,000 miles on it since I had upgraded to a K&N Typhoon CAI.
2011 CPB CRZ
Suspension work, intake, exhaust/2nd decat
2017 Black EcoBoost Mustang
Suspension work, Bolt-ons, BAMA tune