Advantage：The 6an to 5/16 efi adapter fitting has a 37 degree flare fitting taper assures a tight seal and ease of operation,and the female side is used with spring lock design which help you save time and energy.

Main Application: These 6an to 6/15 fuel rail fitting adapters are designed to fit your stock return lines and supply lines of efi fuel filter and fuel rails .

Universal:The quick connect 6an male to 5/16 female EFI fittings are can be used on efi regulator, fuel line, fuel rail and any other metal tube whose size is in line with size of the fuel line adapter.

Torque: all of the an threads fitting has the same max torque 6an with 16.25ft-lb 8an with 29ft-lb for the an male fitting side

Rigid Aluminum Construction: These efi fuel fittings are made of aluminum or plastic and they are coated in a durable corrosion resistant plating an polished to a mirror finish