Double up on your Petri v2's airflow. The "quadflo" Cloud Cap v2 is the perfect option to increase the airflow of your favorite Petri v2 without sacrificing the flavor intensity it's well known for. The Cloud Cap comes as a set including the quad airflow barrel, a color matching top cap, and a gold trim top cap to add that extra level of eye candy.
Note: The Cloud Cap v2 by dotMod fits all Petri versions, including the v1, v1.5, and the v2.