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 depth shim set (2.5mm - 3.5mm)
How to know which set to order?
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.