If I remember right, the flasher interupts the system so that the brushes cycle approximately 50 times per minute. Yes, the Fury bottle is quite different. It mounts over on the passenger's side on a Fury and it's a transluscent white color and completely different shape. The black plastic bottle that will work for the Charger and Imperial occasionally pop up for sale on E-Bay. I usually try looking in salvage yards for 71 Imperials and 71 Furys to get parts for the system. Sometimes you strike gold.