RacingDiffs Differential Backlash adjustment shim kit for BMW E21

If you are looking to install a Limited Slip Differential (LSD) into your BMW differential, or change the gear ratio, then you will most certainly need to adjust Backlash and Carrier preload.
In order to do it properly, this kit is a must-have.

This set contains 10 shims, in the range of 1 to 2 mm thickness, each increasing by 0.1 mm, therefore unlike other sets on the market, RacingDiffs set allows you to adjust your diff with an unmatched precision!
Backlash adjustment is critical. If not done properly, a whining noise and the crown gear damage will inevitably occur.

OEM part numbers:

-168mm:
33139065731
33-13-9-065-731
33 13 9 065 731
33.13.9.065.731

33139065732
33-13-9-065-732
33 13 9 065 732
33.13.9.065.732

33139065733
33-13-9-065-733
33 13 9 065 733
33.13.9.065.733

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-188mm:
33139065734
33-13-9-065-734
33 13 9 065 734
33.13.9.065.734

33139065735
33-13-9-065-735
33 13 9 065 735
33.13.9.065.735

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-210mm
33139065736
33-13-9-065-736
33 13 9 065 736
33.13.9.065.736

33139065737
33-13-9-065-737
33 13 9 065 737
33.13.9.065.737