Due to the development of the GTR R34 as is stated in the artical, there is a Nissan Skyline GTR R34 VspecII Nür. Named after the Nurburgring race track in Germany. The engine was improved and based on the N1 RB26DETT, Iam guessing with N1 or upgraded ballbearing Twin Turbos and engine parts. I believe the NISMO Z-Tune Z1 and Z2 was taken to Nurburgring for testing and developed aswell. Someone can help me out here -Ajax 9 March 2007 1:26PM  