S&B ISO 5011 Test Synopsis. 75-5068 Intake with Cleanable Filter. Airflow Rating: Improves airflow versus stock by: 29.3 percent through side inlet, 43.8 percent through front (Ram-Air) inlet, and ...

Here are the aftermarket air filters we tested in this '04 1/2 Dodge Ram 2500 equipped with a manual transmission. Clockwise from the top left are: K&N, Volant, AFE, Airaid, True Flow, and S&B.