I've got from kaaz Mech LSD, rear EVO 3 Mech LSD, PAR dog box with solid centre spool and a twin plate carbonic clutch.... Twin plate makes your car sound broken, dog box makes it sound like you can't drive stick properly (have to let the gears come to a full stop before going into first or crunch!), locked diff causes you to not parallel park (to avoid those binding Axel sounds) and mechanical diffs make it seem that you have dodgy CVs and that you are too poor to fix it. The joys of having a modified car