If you are looking to dress up your 5.9 Cummins this is the first piece of the puzzle ! Remove the cheap plastic valve cover / CCV filter and replace it with this sweet billet aluminum piece. It includes a billet oil fill cap and baffled CCV canister. Braided stainless vent lines are sold seperately here: https://www.grdiesel.com/store/product/10an-braided-stainless-vent-line-kit
By removing the factory CCV filter you no longer need to purchase expensive filters when they get plugged and it also keeps crankcase pressures in check at high RPMs. All parts including the oil fill cap are manufactured from solid 6061 T6 billet aluminum. Valve cover includes all stainless hardware and sealing surfaces are sealed with o-ring seals. Cover comes with a machined finish and is available polished, anodized red or anodized blue.