Hey all, after asking around and getting nowhere, ill admit when i need help. I have a Supercharged 97 528i With a 6 Spd swap, and the open diff is killing me out the hole. Ive looked into the Quaife and OS Giken which i believe are both Variable, however seem to hover around $4000. Ive found some putting the M5 diff in however with extensive work. Advice?