Stock N1 R34 GTR's rev to 9,000 rpm. But did you see where the rev limit was actually set on the Mines GTR? 10,000rpm, using a stock motor.
The Mines R34 GTR is what we based my mates R32 GTR build on here in Oz, after watching that video. He came across a set of low k's HKS GT2530's, full kit...