I have a Carbonetics 2-way LSD unit for sale.
This LSD will fit in:
-E85 Z4M Roadster
-E86 M Coupe
It's still install on my 2007 M Coupe but I can remove within a week if someone is interested.
Only 4k miles on it
Reason of sale: would rather use that money for a BBK
Price : $1000 shipped
Can also consider trade for a good working condition OEM stock M-Variable + $800