This REAR ARM assembly utilises two Brg,cyl-cal Roller 74g Ky(s) - the highest specified component.
A sample from the products for the Rear Arm include: Collar (1j7), Boot, Rubber, Spring, Tension (1j7), Oil Seal (25x40x5-101).
The component with the lowest price in the REAR ARM schematic is the Washer.