With all the new emissions requirements, Cummins has transitioned to a closed crankcase ventilation (CCV) system. This can result in a buildup of oil residue inside your intake system and reduce the performance and potentially accelerate the wear and tear on engine components.
The Open Breather Kit converts the closed system back to an open breather. This eliminates the oil buildup on the turbo compressor and maintains intercooler cleanliness. 90° vent hose encourages oil drain back and helps eliminate drips. This kit does retain the stock CCV filter.
To clean the element just wash it in warm soapy water, rinse, and air dry before installing.