Right now you're probably scratching your head and wondering what I'm talking about. Fangs are a nickname that's been given to Fork-Mount Wind Deflectors.
So... Why would you need a set of Fangs? If you have a fairing (or a windshield) and use a 1/2-helmet or 3/4 helmet you might have noticed a certain amount of buffetting. That's caused by air rushing around the fairing (or windshield) to fill the low pressure area created by the fairing - most noticably from below. If you're wondering if you need fangs, do this while you're riding - move your left hand across your chest to see if you can feel air rushing upwards. If you do, then fangs might be your solution. They break up the airflow under the fairing just enough to reduce that upward rush of air.
If you've checked, and decided you could use a set, Harley sells two different sets of Fork-Mount Wind Deflectors... each one fits different model Harleys...
|Here is a set of original Fangs mounted on my '17 SGS with
the original turn signals.
|And here are the modified and powder-coated Fangs with the
Auxillary Light Kit.