A 90-degree female flare swivel adapter in AN6. This is the size and angle combination that solves most engine bay routing problems: an AN6 line arriving at a fuel rail, filter or pump often has nowhere to go straight ahead, and a sharp bend in the hose itself restricts flow and stresses the hose end. The elbow takes the turn instead, and the swivel means the outlet direction is chosen after the joint is sealed rather than dictated by the thread. Both ends use the 37-degree AN flare seat. Allow enough clearance around the elbow for a spanner, and check the components you are joining are genuine AN flare.