Aeroflow's 570 series PTFE fittings are a billet 6061-T6 CNC machined full flow fitting which provide an uninterrupted flow. With superior wall thickness, Aeroflow's 570 series fittings are the choice of professionals for use in power steering, nitrous, fuel systems, cooling systems, vacuum applications and oil systems. Aeroflow recommend the 200 series hose and fittings in E85 applications.