you'll get a better result from adding a haltech interceptor or running an aftermarket ECU (Haltech PS500 or similar) in parallel with the stock ECU to control fuel and timing.
Otherwise Import Monster or Tradme would be the best places to find one.
or just convert to Single Turbo....
coyote wrote:Sure, a GTR is fast ... but it's about as interesting as listening to grass grow.
I've got a haltech interceptor platinum sitting in my shed that I can dig out if you interested, from memory it cost me about $750 and only had it fitted for around 6 months.