if you're interested, but I'd guess you're looking for an LSD.

Raj

I am interested! I just want it for the gears, i already have an LSD unit.

but can you find out if it is for sure a big M5 diff, not a smaller ordinary 5 series one, i already made the mistake of buying one that was too small, they look similar from the outside but the gears and everything else is smaller inside and they blow up easier.

Can you find out what car the diff was fitted to or where the gears are from, or can i contact your mechanic.

Thanks
Jim