The component with the lowest price in the CRANKSHAFT - PISTON schematic is the Clip.piston Pin.
The Crankshaft - Piston is made up of components including this Crankshaft Comp. which is the most expensive.
A sample from the products for the Crankshaft - Piston include: Piston (0.50), Sprocket,timing, Sprocket,drive, Piston (0.25).