The diff itself is a used 370 VLSD unit that had about 10k on it, the 4.08 gear set was installed by Performance Motorsports in New York. There is a slight whine at 75-80mph, but otherwise its as quiet as stock. Another 8k put on it after gear install so it has somewhere around 20k miles total on the VLSD itself.
The diff will come dry so you will need gear oil, it also has a 350z cover on it at the moment (I took the nismo cover off and installed it on my used 350 diff) so either re-use your stock cover or pickup a nismo cover off ebay for $100.
This is a must have upgrade for anyone staying NA, SRM will still work but is off by about 300rpm, not very noticeable on stock clutch at all.
$700 picked up, willing ship at buyers expense.