With a quantity of ten pieces, the Bolt,flange 6x25 is the most used part in the E-13 OIL FILTER OIL PAN diagram.
The most reasonably priced component used on the Cbx400f2 1982 (c) European Direct Sales E-13 Oil Filter Oil Pan is the Washer,plug,drain 12.
The E-13 Oil Filter Oil Pan assembly is constructed from several parts from which the Pan,oil is the most expensive.