The twenty-six Gsf1200sa 2000 (y) (e02 E04 E17 E18 E22 E24 E25 E34) Second Air (gsf1200w/x E18) component parts are all listed in this schematic.
The sub assemblies and components that make up this Second Air (gsf1200w/x E18) include this Valve Assy,2nd Air Reed, the most expensive part.