Speedflow -12AN Male Flare to Nissan RB Series Valve Cover Breather Fitting. Manufactured from marine quality 6061-T6 billet aluminium for superior corrosion and fatigue resistance. Made from a billet rod and fully machined in a single process in a CNC machine. Black hard anodised aluminium construction. Simply remove the factory steel fitting and press this adapter in to allow the connection of braided ends.