With a quantity of five pieces, the Bolt,flange,6x65 is the most used part in the E-6 diagram.
A sample from the products for the E-6 include: Clip,b65,tube, Gasket,crankcase (mca), Oil Seal,20x32x7, Washer,plug,drain 12.
The lowest price component in this E-6 parts-list fiche is the Washer,plug,drain 12.