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This pivot block for the Nikko Bison/F10 will replace the broken one on your car. This is the stock pivot block. You will need to press fit the collar back onto the pivot shaft like it was originally. Make sure all holes are cleaned out including the main bore for the pivot axle. This has only been tested on two of these cars so there is a possibility that some minor alterations may be needed for your car.
If you want the upgraded pivot block that no longer needs the collar, it is part number F10001-01