Well I broke down and went further into debt and bought a nismo lsd from zcarparts.com since I could not find one anywhere worth a chit. Here is the question I have 3:70s right now and finish the 1/4 mile in 4th gear and cross @ 110mph at about 5500rpms. I was wanting to go with some 3:90's but am afraid ill have to shift to fifth gear! anybody out there running 3:90s with a turbo? as long as I could do 115 in 4th gear with 3:90s I would be fine.