nismo lsd part question! plz help

[kilword1]

ok im looking to soon get the nismo 2way lsd.....my budy at the nissan dealer gave me a part # for my s13.....it is either a #38420-RS660 and a 660A
but every site i check with nismo parts.....say the lsd for for s13s with lsd is RS661 and ones with oem lsd(vlsd) RS662....
whats the difference with the 660 and 660A and compared to the 661????
please help!
and when he tried looking up the RS661 he gets nothing...

[masshim]

I just got mine from a local Nissan dealer here in NJ a few weeks ago. Part# was 38420-RS661 for open-diff.

I checked Nismo's Japanese site and it says RS660-A is for S13 and S14 w/HICAS w/o VLSD.

It might work but I'd ask your friend at the dealer to call around and check.
Also, if you do get the LSD, the bearing isn't pressed in so take it to a machine shop to get it pressed before you start taking the rear end off.