[Obike]

Quaife has a LSD for the tC (part number is now available) but I have not found anyone that is actually selling. This one site I found has yet to respond to my inquiry.

 

[Obike]

A LSD is a Limited Slip Differential.

http://auto.howstuffworks.com/differential.htm

 

[Obike]

Was able to get in touch with Quaife. Whilst there is a part number available for it; there is, as of now, a expected release date or price. I was told, off the record, to expect it "before 2006".

Since it doesn't need CARB approval, let's hope that they don't pull a TRD