Basic pack V1 includes: 

- 7x clutch/friction discs

- 8x Hardcore steel plates

- 1x Free play delete (fix) shims


Advanced pack V1 includes:

- Basic pack V1 + Bearing & oil seal kit 

(You save 10%!)


Basic pack V2 includes:

- 8x clutch/friction discs

- 9x Hardcore steel plates

- 1x Free play delete (fix) shims

Advanced pack V2 includes:

- Basic pack V2 + Bearing & oil seal kit 

(You save 10%!)


- Version 1 Fits: E46 M3 1999 - 2005.  

- Version 2 Fits: E46 M3 (2005 - 2006, CSL), E9X M3, E60 M5, E63/E64 M6, Z4 M

*For V2 unit, you will need opening tool.


How check is your diff V1 or V2 without disassembling anything?

The free play in output shaft on V1 is on the right side while the free play on V2 is on the left side. So you can simply lift the car and check on which side is the free play.  

Or if it is easier for you, just send us your VIN and we will check for you.


Highly recommended for all who visit race tracks regularly!

The kit fits E46 M3 GKN factory differential and it doesn't requires any modification. It is a direct replacement for stock clutches. 


What you get with the Performance clutch stack?

This clutch stack will provide enhanced lock compared to OEM clutches, saving your viscous coupler as it will take much less load than before. The failure of the viscous coupler in these differentials is one of the main reasons why everyone prefers the ZF mechanical unit. But with this clutch stack now, you don't need to worry about the viscous coupler and waste money on the aftermarket units.

One year warranty!

What do you get with Free play fix shim?


Almost every E46 M3 Factory LSD unit has problem with the free play in the right drive shaft. That can be recognized by noticing a ‘’tap’’ sound when engaging into 1st gear, and/or the oil leak on right side of the differential. This problem can cause further damage to your differential e.g. clutches and bearings’ premature wear due to the lack of oil. It is highly recommended to address this as soon as possible. 

The RacingDiffs FREE PLAY DELETE SHIM will resolve this problem without any modifications for good. Just replace the factory shim, which goes behind the right side gear, with this shim. It’s that simple.


Watch our Complete installation tutorial and subscribe to the RacingDiffs YouTube channel. 

Version 1 step-by-step tutorial:

Version 2 step-by-step tutorial:

Coming soon...


*All parts fits OEM BMW GKN LSD unit without any modifications. 

RacingDiffs Recommends Motul Gear Competition 75w140 oil for all products.