These OEM M6x35mm torx bolts are used in many different engine and transmission applications, but the majority of them are used to hold down the camshaft girdle to the head.

The quantity required varies based on the engine they are being used on. Here's a quick guide that shows how many your particular engine needs:

4cyl.....22 or 23 pieces (depending on engine code)
5cyl.....29 pieces
6cyl.....42 pieces
8cyl.....48 pieces
10cyl...56 pieces