The twenty Gsx600f Katana 2005 (k5) Usa (e03) 2nd Air (model K4/k5 E33 component parts are all listed in this schematic.
A sample from the products for the 2nd Air (model K4/k5 E33 include: Hose(4.5x8.5x600), Pipe,2nd Air No.1, Pipe,2nd Air No.2, Cleaner Assy,2nd Air.
The Gsx600f Katana 2005 (k5) Usa (e03) 2nd Air (model K4/k5 E33 consists of twenty pieces with the Valve Assy,2nd Air being the most expensive.