The AN thread is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid. It became popular for usage within Professional racing for the ability to easily customize new lines. From there it's usage spread to the aftermarket automotive performance field for its ease in adaptability, upgradability and durability.
Color : Blue
Style: Male Flare Reducer Union
Fitting Style:3AN TO 4AN
Professional Installer is Highly Recommended (No Instruction Included)
Fit All Fuel/Oil/Fluid/ Water/Air Line with 3AN TO 4AN