This is a great directional carb cap to add to your banger.  Its got a nice round marble shaped top that works as a handle to allow for easy movement to control the direction of the airflow. 

• Type: carb cap
• Material: borosilicate glass
• Colors: black, white, or green
• Dimensions: 1.5"(L) 1.5"(W) x 2"(H)
• Weight: .04 lbs