Gear ratio Swap for BMW non M set 215/220K

If you decide to change gear ratio of your BMW differential, than this set is absolutely a necessity. It includes parts without which you can't complete a swap successfully. - Adjustment shim set / C clip set - Pinion oil seal - Large pinion bearing - Crush sleeve shim - Pinion depth shim set (3.3mm - 3.7mm) How to know which set to order? Check on BMWFans.info database. This Video will guide you how to use it. Or simply send us the last 7 digits of your VIN and we will confirm if they fit with your requirements as soon as possible. BMW differential gear ratio change Backlash adjustment shims 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 ---------------------- -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 ---------------------- -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 33.13.9.065.738