Yeah Z1 has them, also I haven't tracked mine but I felt I was able to tell a large difference in spirited driving from the open diff without a doubt. It is complete night/day difference yes and even when just running through the gears on an on ramp it's much more confidence inspiring. I like the extra grip and less tire slip when drag racing also although I haven't launched mine..just some highway runs(I KNOW FORE SHAME !!!!).
PS: Also I think Forged Performance may sell some Diffs and I looked at Carbonetic also but the frequent oil changes swayed me away. The OS Giken is not nearly as frequent from the sound of things. If your car is a daily and rarely sees the track you can change it every 2-3 oil changes and be fine from what I've read. Also OS Giken has never had to service one of their diffs..ever. In the private for sale section I have a thread started about someone selling one brand new for a killer price.
Last edited by B1nks; 03-12-2010 at 06:01 PM.
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