[Krash92]

Originally Posted by oceanview

Tuner Motorsport offers Quaife complete box exchange. So call them.
http://www.turnermotorsport.com/c-37...and-parts.aspx
http://www.turnermotorsport.com/t-fa....aspx#MoreCore

Only a complete Diff box exchange can be done easy by a garage.
Changing the inner LSD part needs a lot of know-how because the Crown wheel is welded, in all the BMW's produced after 2007:

I just found this on Turner, Part #: F3X-335-435-MANUAL-DIFFERENTIAL(http://www.turnermotorsport.com/p-21...l-upgrade.aspx). There's a core charge and they give you 30 days to return your stock differential. Now the question is which slip option to go with.
Limited Slip Options
No limited slip upgrade, keep the open diff.
2 clutch LSD, Add $2,000.00 (USD)
3 clutch LSD, Add $2,300.00 (USD)
3 clutch LSD with variable ramp angles, Add $2,700.00 (USD)
Quaife helical LSD, Add $1,400.00 (USD)
OS Giken Superlock multi-plate LSD, Add $2,000.00 (USD)
OS Giken TCD multi-plate LSD, Add $2,815.00 (USD).

Any suggestions from the group? I track my car occasionally and autocross.