BMW e30 secondary diff mount

-23% BMW e30 secondary  diff mount

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E30 secondary diff mount (dual mount conversion)

If your e30 is making serious power, your differential is seeing  serious loads. Thats where the e30 dual mount conversion comes in. Absolute must for v8 swaps. By adding a second mounting point you are effectively spreading the load your stock diff mount and bushing would see. There is a reason that BMW switched to dual mounts on the later models. This conversion was also done in higher powered cars by Hartge.  This will not fit E36ti models or Z3 models.  Installation is simple. 6 bolts is all it takes (all hardware is supplied). Simply unbolt the two bolts on your diff cover and bolt ours up. Drill four holes into the trunk and bolt it up. Thats it!! Comes with chassis mounting points. This will only work with medium case differentials. It will not work with early model small differentials. Our e30 second diff mount includes:

  • Cnc aluminum diff mount and spacer
  • Two 10.9 grade longer diff casing bolts
  • Hardware for new diff bushing (diff bushing not included but is an option)
  • Heavy duty mounting brackets (and trunk plate) as well hardware. Powdercoated black. 
  • 100% bolt up
  • No diff sensor issues that other conversions have


Select "Finned MZ3 cover version" if you are running a MZ3 finned cover on your e30. We will then ship you correct brackets to fit the finned cover. The 2 hole spacer shown in the pictures will not be needed for the MZ3 cover application because its already offset. Does not include Z3M cover (obviously).


We were inspired to bring this to market after seeing Frank Macaluso's S62 e30 swap crack the diff cover. His car is in the 400hp range. This will not fit E36ti models or Z3 models. 

Below are the pictures of his differential cover.


e30 second diff mount


Installed pictures of e30 secondary diff mount:



E30 second diff mount instructions:

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  • Brand: Garagistic
  • Product Code: E30 secondary diff mount
  • Availability: In Stock
This Special Ends In:
  • $195.00
  • $150.00

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Tags: e30 dual diff mount, e30 hartge diff mount, e30 double mount, e30 diff mount, diff, e30, differential, diff