SAN2655 Super Q Kaaz 2way LSD
Yup, no need to swap shafts or anything just goes straight in stock UK S12 diff housing.
The super Q is the quieter and less annoying one
And Kaaz have a sale on but watch out for tax, vat, duty, you might be better off just buying in the UK so you know the actual cost.
http://www.kaazonline.com/88.html
http://www.driftworks.com/kaaz-lsd-d...3-s14-s15.html
Just looked on DW, the price has gone down, but the non-super Q varient is still ?654.
Super Q is ?734 and I think it's worth the extra ?80.