The Water Pump is made up of components including this Housing, Water Pump which is the most expensive.
The most reasonably priced component used on the Yzf-r6 2005 5slm Europe 1d5sl-300e1 Water Pump is the Bolt, Hexagon Socket Head(1wg).
Some items from this specific schematic: O-ring(52h), Joint 1, Bolt, Flange(3dm), Cover 1.