Gear ratio swap set for BMW Motorsport Z4 M

This Gear ratio swap set is a must-have if you wish to change gear ratio of your BMW M3, M5, M6 or Z4M differential. It includes parts without which you can't complete a swap successfully. Adjustment shim set Pinion oil seal Large pinion bearing Crush sleeve shim Pinion position shim set (2.5 - 3.5mm) If you are not sure how to change gear ratio properly, make sure you check this video out. BMW E46 m3 differential gear ratio 4.10 installation Backlash adjustment shims OEM part numbers: 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 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.