I'm more worried about the fact that my S4 TII diff is stock and has 148,000 miles on it... I dont think I can afford to buy rebuild clutches right now, so if I can shim it to restore the lock up at least a little, it would be a huge benefit for me.
I'm not even sure, I think if I can get a set of rebuild clutches for a decent price, then I might not even bother going with the OS Giken. Any LSD is better than no LSD, and if the TII diff can handle over 500hp, then I think I'm set.