Racing Diffs Precision Shim Kit: Ultimate Backlash Adjustment for BMW Differentials When optimizing your BMW differential, especially when integrating an LSD or altering the gear ratio, precise backlash adjustment becomes paramount. The Racing Diffs Precision Shim Kit is tailored exclusively for this purpose, ensuring your BMW differential runs without a hitch. Broad Compatibility: Expertly designed to fit a wide range of BMW differentials including 168mm, 188mm, and 210mm. Compatible models comprise E21, E28, E30, E36, E34, E32, E31, and Z3. Precision-Centric: This kit comes packed with 10 top-tier shims, spanning from 1mm to 2mm, incremented by 0.1mm. The focus? Precision. By having a wider range, you can achieve the optimal backlash setting for your differential. Preventive Care: A proper backlash adjustment not only eliminates unwanted noises but more importantly, safeguards the crown gear against premature wear and potential damage. Industry Superiority: Unlike other offerings, Racing Diffs emphasizes unparalleled precision, ensuring your BMW differential is tuned to perfection. Every BMW enthusiast understands the importance of precise tuning. With Racing Diffs, you’re not just making adjustments—you’re upgrading to the pinnacle of precision. Ensure optimal performance and longevity for your differential with Racing Diffs' Precision Shim Kit. OEM part numbers: -168mm-3313906573133-13-9-065-73133 13 9 065 73133.13.9.065.731 3313906573233-13-9-065-73233 13 9 065 73233.13.9.065.732 3313906573333-13-9-065-73333 13 9 065 73333.13.9.065.733-----------------------188mm-3313906573433-13-9-065-73433 13 9 065 73433.13.9.065.734 3313906573533-13-9-065-73533 13 9 065 73533.13.9.065.735-----------------------210mm-3313906573633-13-9-065-73633 13 9 065 73633.13.9.065.736 3313906573733-13-9-065-73733 13 9 065 73733.13.9.065.737