Add the finishing touch to your 1998.5-2018 Dodge 5.9L/6.7L Cummins with the XDP Billet Oil Cap XD248. A direct replacement for the old, ugly factory cap, the XDP Billet Oil Cap simply threads in your valve cover giving you an upgraded, custom look. Machined from billet aluminum this 1-piece Oil Cap features a built-in o-ring seal and a black anodized finish.