Proflow's oil fill cap breather is the easiest way to add an aftermarket catch tank to the Ford Barra engine without the need to modify the OEM valve cover. No more welding fittings to your valve cover. Designed to directly replace the factory oil cap, they feature an internal baffle inside the cap which helps to reduce the transfer of oil to the catch can. A -10AN ORB is located in the centre for custom plumbing to the catch can or PCV. Billet aluminium construction with a black anodized finish.