Cummins 4BT Billet Tappet Cover with one breather housing

Fits Cummins 4BT 3.9L

Fully machined with billet aluminum in house.

Comes with baffling built in, breather port 12AN connector

Breather will not clear the factory fuel filter that is screwed into the cylinder head. So you must have the fuel filter relocated to a different location to use this cover.