This BavarianDiffs rear stand will make your differential case more stable on the working bench. I mainly use it on medium case E24, E28, E30, E32, E34, E36 but the bolt spacing also works for any small and large case.

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It would need to be higher to work with e46 and e39 M5, or you can make your own front 3rd leg.

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Add this to your order for 15$