Tenaci BMW LSD differential - BMW E46; E87; E90;

BMW E46 from 2002
E87, E90
335i from 2007

1.5/2.0 way LSD (limited slip differential gear). Very similiar to the design of Cuscos.

Note! Distance between crown gear surface and bearing surface should be according to the two pictures. Measure on your car before ordering.
For this differential the measurements are the following:
M1=36.5mm
M2=97.0mm

How a Ramped / LSD type differential  works: http://www.cusco.co.jp/en/pdf/p27_p29.pdf