Replace your plugged factory CCV (Crank Case Vent Filter) on your 03-05 5.9L Cummins truck with this new replacement filter from Cummins. As these trucks get more and more miles on them, the CCV filter can become clogged not allowing proper venting of the crank case gas. This can lead to raised crank case pressures putting seals and valuable engine components at risk. Eliminate that issue with this simple replacement filter. This filter comes with everything needed for installation including a new o-ring.