Of all the components used in this assembly the Gasket Kit,a (nas) is the most expensive.
eight components are shown in this Cbr600f Hurricane 1994 (r) Brazil Gasket Kit A exploded diagram.
A sample from the products for the Gasket Kit A include: Gasket,ex.pipe (nas), Gasket,head Cover (nas), Washer,sealing,6., O-ring C Case.