I have three R200 LSD's straight from Japan. They all come with the case and gears so you'll only need 280Z half shaft and diff. mounts to bolt in your 240-280Z's. The ratio is 4.375(you can't get this in the US) on all three and will be perfect for drag racers. *One of the LSD's is a NISMO one and has already been overhauled. I'm asking $450obo on the regular one and $600 for the NISMO version. I live in So. Cal. and I'm planning on putting these out at the Motorsport Auto show.