Features:    CARB EO# D-590-9    Dry, disposable Filter     Improves Airflow Over Stock By 34%The S&B 75-5053 Cold Air Intake System is the ultimate in high-performance airflow for your 2011-2016 6.7L Powerstroke. This system was definitely worth the wait given that it improves the airflow by 34% versus the stock system and beats Banks' kit (#42215) by 19% at 580 CFM.