Not a stamping, they are machined from solid round stock for accuracy. The I.D. is machined .002" smaller to accommodate worn surfaces on the crankshaft. Hone to fit your crank. U.S.A.
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This product has additional items that other customers have found useful or are necessary for proper installation, please check them out.
This pin holds the lower pulley on the crankshaft and the ratchet for the crank locks into the pin while cranking the car. If this pin is loose it may cause a knock as if you had a rod knocking....