This is the biggest standard LSD type differential fitted to BMW's It is fitted with 2 different types of LSD unit as standard as well as the obvious open unit, the desirable Plate LSD that can be serviced and modified in house to many different criteria of locking as well as the combination style of LSD (of which there are two variants) as found in the E46 and onwards cars The combination LSD can be serviced if the viscous pack isnt starting to groan on turning but not modified for different locking amounts - please see the specific section for these differentials The 210/215/230 differential is more commonly known as the "big" or "8 bolt diff" due to the 8x M8 bolts retaining the output bearing housings on either side of the main casing Fitted as standard with a LSD to: M3's (E36(evo), E46, E90, E92) M5's (E28, E34, E39, E60, F10) M6's (E24late, F12) 8 Series (E31) Ratios available are: 2.93:1 3.08:1 3.15:1 3.25:1 3.45:1 3.62:1 3.64:1 3.73:1 3.85:1 3.91:1 4.10:1 (motorsport only) 4.27:1 (competition use only) 4.44:1 (motorsport only) 4.68:1 (competiton use only) 5.10:1 (competition use only) If you have time patience and a little luck, all these ratios can also be found in various standard production cars (exculding those listed as motorsport/competition only) If deemed to be in good condition by JCRacing, customer supplied ratios can be fitted into into your differential Many aftermarket LSD systems of differing styles are available if required