I have a Quaife in mine, they were about $2,500 when I bought mine, maybe more now. In Sydneys recent rain with my sticky tyres I had almost 100 % traction, it will step out but you have to try really hard, like turn wheels and hit it, when it does go sideways the whole cars moves sideways unlike open pegleg diffs, this could cause dramas, you just need to be ready for it.