NOTE: Cummins Parts Are A Non-Returnable Item. Please make sure you have ordered the correct part for your Cummins diesel engine!
This Cummins 399820 Gasket Cross Reference:
This 3999820 Crankcase Breather Gasket is a genuine Cummins part.
NOTE: Do not ignore the message on your overhead console when the Crankcase Vent filter becomes clogged. KLM Performance strongly recommends you immediately address this issue to save yourself allot of time and money!