Amal Velocity Stack Long 389 monobloc
New long velocity stack for your Amal 389 series carb. This particular stack is a lot longer and ideal if you are running dual carbs on any of the 50's and later 650'S . This stack will not fit a single carb setup, concentric carbs and will not fit a Micuni. We do want to warn thats if you are running the bike in highly dusty areas that it is still preferable to use an air cleaner. If youa re under duress you can put a sock over your stacks to help filter the dust in the air.