there are only two limited slip differentials that i know off,

first would be Phantom Grip, around $250, which is basically a fake LSD... it's just a mod for your open differential and changes it up. Some people have it, and they say it works really well for drag racing but sucks for cornering

second is Quaife limited slip, which is about 1200 bucks, true LSD and if you have the money, i recommend it.