redline is about 160ish. I did the math way back, but I forgot it. I did a simple calculation in 5th gear. Like I was going 35mph at xxxxRPM is equal to xxxMPH at 7300RPM (my redline, on my stock z, no chip). I hear that redline is somewhere around 6600RPM on other Z's from factory. Dunno why mine goes up that high.