Very few S13 240sxs came with limited slip differentials from the factory. Certain SEs did although im not sure which.
Every s13 240sx with super hicas had the LSD in it but finding a hicas s13 is difficult enough already
also the SE LIMITEDs had lsds. once again very rare.
__________________
Advocate for the People's Republic of Awesome
rest in peace tim.