I think the ZZ-3 was introduced in 2000 or 2001. I had a R&T issue with a little bit on it. They went on about the whole carburetor thing, so that's where I got my first info about them. I played GT 2 and found TKs in it, got a ZZ-3 and tuned it to around 300 hp. That one had a SR20DET, so it must have been Japan spec. Track TKs are rare, but very fun, at around 1500 lbs, they are like an Elise with a ridiculously powerful engine