The most reasonably priced component used on the Chf50 Scoopy 2002 (2) Japan Af55-110.120 E-8 is the Screw Cross 3x10.
A sample from the products for the E-8 include: Pump Assy,oil, Rotor,outer, Screw Cross 3x10, Rotor,inner.
The E-8 assembly is constructed from several parts from which the Pump Assy,oil is the most expensive.