Tapered cone air filter with adapter that fits Dellorto SSI & VHB carbs. These kits have a special threaded adapter with a built in velocity stack for maximum air flow. These filters fit great and use wire mesh to filter and will not affect jetting on bikes currently using velocity stacks. filters are 3" at the carb end and taper down to 2" with a nice chrome end cap. Overall length is 3" and please order kits from the pull down menu. NOTE: On all Falcone models the fuel line crossover must be turned around and a new longer piece of fuel line installed.